T Phn p, Thy s Sinh hc: 26 (2013): 43-49

43

BII THI 
 I HUYN M TNH LONG AN
Tr
1
 
1
n
1

1
1
B p c ng dngi hc C
Thông tin chung:
 08/11/2012
20/06/2013

Title:
Improvement of soil fertility
and rice yield on old alluvial
soil at Moc Hoa district,
Long An province
Từ khóa:

 

Keywords:
Old alluvial soil, compost

h
sinh     
 
 



 
  

T Phn p, Thy s Sinh hc: 26 (2013): 43-49

44
1 M U
Nhiu v    
u qu 
ng nhu c
  th gii (Olk  ., 2002). Hin ti,
  th    c chim hai
n ba v i ding 14
triu ha  n c
  n l     o ca
 u (Cassman  , 1995; Mahieu 
ctv. suy git
n nay trong nhi
n t t ra s nghi
ng v  n vng ca h th 
(Cassman  , 1997; Olk  , 1996).
Mt s  hin
      d    

gim mt s vi sinh vt.
T  sung gim, hiu qu kinh
t mang l 
c thc hin nhm ci thi
         n
xu         theo
ng sn xun vng.
2 N CU
m
        
(Plinthosols    ng 4,7 thuc
lot chua vng cht hu
      i cation
(CEC) th   m tng s 
i rt thp. Dung trng
tng m       
ng b   ng Fe
2
O
3
t  
Al
3+
   t cao (Bng 1). Nhng
          
     ng bi  i
thi         t
ng.
Bng 1: Mt s ch c cm
Ch 

3
)
1,32
 xp (%)
43
Fe
2
O
3
(%)
2,84
Al
3+
(meq/100g)
2,53
Thnghim ng ruc thc hin di
hn t      ti x Bnh
Tn, huyn Mc Ha, tnh Long An, theo th
thc khi hon ton ngu nhin gm nm
nghim thc vbn ln lp li vi
di
m
2
cho m  m, gm
cc m hnh
nhsau:
Nghim th 

Nghim th      
tn/ha  

ng
m mt  nh bng

S li    c x  ng
ng
 
m thc  m
3 KT QU O LUN
3.1 m (N) hu dt
Kt qu  
cho thm hu dt  m
thc l ng t 21,2 -

th   i nghim th   
t).  m th
         
 t hiu
u ki
tri 
 ng N hu dng
ng thi, nghim th
         m
hu d t
qu  c gi
hm hu dng t s 
hp cht het
al., 1999).

m hu dt gi
nghim thm

     m thc
  -   ng N-NH
4
+

ng gim. Sau tu
ng N-NH
4
+
git
       m th 
-u
i nghim th t qu
 ng cht hm
        u
ki    ng l  
chuytrate. T Phn p, Thy s Sinh hc: 26 (2013): 43-49

46

N-NH
4
+



3.2.2 ng N-NO




3.3 ng cht ht
Kt qu ng cht
h   t bi ng t 2,14-2,8%
ng cht hp
 u  m   nghim th 
    ng cht h   
      mt th i
m th t qu
    nghim th    
mi v thu hoc r i trong
ng cht ht
   m th    
ng oxy
       t hu
 m th      
h    ng cht h   

 c gi
h        p chng
nm Trichoderma  t. Chng n 

din ra ti nghim th


0
10
20



3.4 Cacbon d y
Kt qu    ng cacbon d
 y mc
m th ng
cht hm thc
   m th    
         
  ng cacbon d   ca
nghim thi th
thm thi. Kt
qu  c gi 
   c g   trng
, thiu oxy, hong ca vi sinh vt
m kh 
tha thc vt. Mt ngc
c, cht hn din  ng hp
ch
 ng cacbon d 
hu trong h th
h
so vi nghim th
th c gi
m  n cacbon d 
h         
ng h vi sinh vu kin
t vi sinh vt ho
ng cacbon d y.




4 KT LUN
Kh    m hu dng, s
ng cacbon d 
ht  m th
 m th 
         i
nghim th
h
 

U THAM KHO
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Effect of lime on nitrogen availability in paddy
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Alcatara, M.A Dizon and D.C Oid, 1995. Soil
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of young humic acid fractions in tropical
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chemical characteristics for rice production in
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Wiley and Sons, Inc. 1984-1996.
12.  
ng cht cng
bu Long. Hi Khoa ht Vit
Nam. Tt 15, trang 26-32.