giáo trình mô đun chọn và thả giống cua đồng

BỘ NÔNG NGHIỆP VÀ PHÁT TRIỂN NÔNG THÔN





GIÁO TRÌNH MÔ ĐUN
CHỌN VÀ THẢ CUA GIỐNG
MÃ SỐ: MĐ 03
NGHỀ: NUÔI CUA ĐỒNG
Trình độ: Sơ cấp nghề








2
TUYÊN BỐ BẢN QUYỀN
ác 
ác 
.

 
MÃ TÀI LIỆU: 03

3
LỜI GIỚI THIỆU



              








nuôi không cao.
 



 và




Thông t-
- 




3) Mô 








4





 





Bài 4. Th





- 







Tham gia biên soạn:
1


5
MỤC LỤC
ĐỀ MỤC TRANG
 3
 7
 8
 cua  8
 9
1.1.  9
a 10
 11
 11
 12
Bài 2:  15
1.  15
 15
 16
2. Xác  18
 18
 21
 26
 27
 27
 27
 28
 33

 33
 33
 33
 33
 33
 36
 38
 38
 38
3.3.  41

6
3.4. Dán nhãn 45
 45
4.  49
 49
4.2. Ph 50
 51
 51
 52
 53
 57
 57
 58
 59
 59
3 61
 63
 65
 66

 66
H 70
: 70
 70
: 71
IV. H 71
 77



7
CÁC THUẬT NGỮ CHUYÊN MÔN, CHỮ VIẾT TẮT

pH: 
 :
-  (pH < 6,5)
- ng tính (pH = 6,6 - 7,5)
-  (pH > 7,5).


O
2
: dưỡng khí.
H
2
S: Khí h H
2
S 
H
2

S , H
2
S trong

trong H
2
S.
NH
3
: Amoniac  NH
3

 .
CO
2
: không màu 

      
 và axít cacbonic.
NaCl: Clorua natri     , ,     
, , sát trùng
DO: Oxy hòa tan 
. Khi

 
 - 10ppm.

8
MÔ ĐUN CHỌN VÀ THẢ CUA GIỐNG
Mã mô đun: MĐ 03

Giới thiệu mô đun:
 
  gi 

-  
- cua  > 80% 
;
- cua 
Nội dung mô đun gồm:
- ;
- cua ;
- cua ;
- cua .

- 
- 
- 







- 

- 

- 


9

Bài 1: Xác định thời vụ thả cua giống
Mã bài: MĐ 03 - 01

Mục tiêu:
- 
;
- 
A. Nội dung:

 
và 

-  
-  nuôi phù a.
1.1. 

0

0


0
C (Hà

0

0


0
,
 vào tháng 12 và tháng 
          nuôi   


             
ác 
.


22  28
0
C.
- P

+ 

10
+ 

báo.

+ ;
+ .
 
các 

 

22  28
0
C.

            





 
             
trình nuôi.
              
 cua hoàn toàn.
- P 

+ 
+ 

báo.

+ B
+ 


11
Thông qua tìm h ác  




 8 11 và 
 11.

Trong nuôi  



--thu-
 
-  
 


- P gió mùa 

+ 
+ 

báo.
              
nuôi

 gió mùa.
 vùng nuôi.

do có
ác 
 


12


ác ác 










+ M - 5
+ M3 - 5
+ M9



 ,  2 4 , mTrung
 
 

V
 5
 5
N
   8.

B. Câu hỏi và bài tập thực hành:
1. C
-  

13
- ?
2. B
1.1:  cua 
- 
+ 
+ 
- 
+  / 1 nhóm;
+ Bút bi: 1 / 1 nhóm;
;
- Cách th
- 
+ C
  có g;
.
- hoàn thành: 2 
- 
STT
Các hoạt động
Số lượng và chất lượng sản phẩm
1


.
2

    

       
có cua     

3








14


C. Ghi nhớ:
B 4  am t 8,
 5;
 
0
C.

15
Bài 2: Lựa chọn cua giống
Mã bài: MĐ 03 - 02
Mục tiêu:
-       ác      
  


-  
-  
A. Nội dung:
1. 
1.1. 
             



  trong quá trình nuôi 
là 400  450 con/kg.
  












Hình 3.2.1: C

16
1.2. 
 

+ 
   n,  
 Khi 









Hình 3.2.2: C càng
+ 
 có màu n.









Hình 3.2.3: C



17
+ Không gãy càng, chân

   càng, chân.

không 









Hình 3.2.4: C










Hình 3.2.5: C
+ 

 

18











Hình 3.2.6: C

ác 
mai cua, càng, chân, 

2.1. 
 tra 
. 

ác 
 ác , vó. Thúng,
vó  
cua .

19










Hình 3.2.7: T
, thúng 
- , thúng  thu cua.
, thúng  thu cua  












Hình 3.2.8: Lthu cua

- , thúng 
, thúng  vó cá 
 

20











Hình 3.2.9: Cá 











Hình 3.2.10: 


, thúng, vó. , thúng, vó có
 200 gam cá 
- 

- , vó 

21
, thúng, vó th, thúng, vó thu cua
  .
M, thúng, vó cách nhau 1  1,5m. , vó  vào
  vó 
 Các    , thúng, vó    
thúng, .









Hình 3.2.11: 

 
  sáng  cân cu chính xác


Hình 3.2.12: N

22

.

cân.











Hình 3.2.13: C 

Hình 3.2.14: X


23
P
p mai.











Hình 3.2.15: C

Hình 3.2.16: 
 10kg. 
nên s 
 
cân chính xác.

24
áng 












Hình 3.2.17: M

Hình 3.2.18: Mng rõ


 70 cm.


25










Hình 3.2.19: Cn

+ Khi   

Hình 3.2.20: 



.