摘要
通过夏玉米施加聚丙烯酰胺 (PAM)的大田实验 ,确定了 PAM的改土、增产效应。研究表明 ,PAM施用量为 0 .75～ 1.2 5 g/ m2 时可使土壤容重平均下降 0 .0 6 8g/ cm3 ,团聚体总量 (>0 .2 5 mm )平均增加 30 .2 % ,同时 ,PAM增产效果显著 ,增产幅度为 11.7%～ 18.3%。
After the study of adding polyacrylamide to summer maize in farmland,the effect of Polyacrylamide (PAM) on soil and yield is obvious. The result shows when the concentration of PAM is between 0.75~1.25 g/m 2,the bulk density of soil can decrease at the rate of 0.068 g/cm 3 and the pore degree of soil is increased. PAM can increase the amount of soil aggregate(>0.25mm)at the rate of 30.2% . That is PAM has a better effect on soil improvement. PAM can also increase yield significantly at the rate of 11.7 ~18.3%.
出处
《水土保持研究》
CSCD
2002年第2期55-58,共4页
Research of Soil and Water Conservation
基金
国家重点科技产业示范项目"渠灌类型区农业高效用水模式与产业化示范"( 99-0 2 1-0 1-0 2)
