[Effects of no-tillage and stubble-remaining on soil enzyme activities in broadcasting rice seedlings paddy field].
A field experiment was conducted to study the effects of four cultivation modes (conventional tillage, no-tillage, conventional tillage + stubble-remaining, and no-tillage + stubble-remaining) on the activities of urease, acid phosphatase, protease, and cellulose in different soil layers in a broadcasting rice seedlings paddy field. Under the four cultivation modes, the activities of test enzymes were higher in upper than in deeper soil layers, and had a greater difference between the soil layers under no-tillage + stubble-remaining. In upper soil layers, the activities of test enzymes were higher in the treatments of no-tillage than in the treatments of conventional tillage, being the highest under no-tillage + stubble-remaining and the lowest under conventional tillage. In deeper soil layers, the test enzyme activities were the highest under conventional tillage + stubble-remaining, followed by no-tillage + stubble-remaining, no-tillage, and conventional tillage. During the growth period of rice, soil urease and cellulose activities were lower at tillering stage, increased to the maximum at booting stage, and decreased then, soil acid phosphatase activity was higher at tillering stage but lower at elongating stage, whereas soil protease activity peaked at tillering and heading stages.
College of Agronomy, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China. rwjun@126.com
Wan-Jun
WJ
Ren
Yun
Y
Huang
Jin-Xiu
JX
Wu
Dai-Yin
DY
Liu
Wen-Yu
WY
Yang
D000135:Acid Phosphatase / Q000378:metabolism; D000383:Agriculture / Q000379:methods*; D002482:Cellulose / Q000378:metabolism; D004798:Enzymes / Q000378:metabolism*; D012275:Oryza / Q000254:growth & development* / Q000378:metabolism; D018547:Plant Stems / Q000737:chemistry*; D012987:Soil / Q000032:analysis*; D014510:Urease / Q000378:metabolism
D004798:Enzymes; D012987:Soil; D002482:Cellulose; D000135:Acid Phosphatase; D014510:Urease