Issue Information :
روزنامه با شماره پیاپی سال 1995
Pages :
9
From page :
431
To page :
439
Abstract :
A decline in productivity in wetland rice has been detected in some intensively-cultivated experimental farms in Asia since the early 1980s. Increased doses of fertilizer N are being used in both experimental and farmersʹ fields to maintain the original yield levels. Little attention has been paid to judicious management of native soil N, which is the principal N source for rice, and to biological N2 fixation (BNF), which largely replenishes the soil N concentration. We review here various effects of long-term flooding and puddling associated with intensive cultivation of wetland rice on soil N availability and BNF. Some strategies are suggested to efficiently manage these two N sources to sustain high productivity of the ricelands.
Journal title :
Reports on Mathematical Physics
Serial Year :
1995
Journal title :
Reports on Mathematical Physics
Record number :
1990862
Link To Document :
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