缓释、控释肥料对大豆产量的影响

EFFECT OF CONTROLLED RELEASE FERTILIZER ON YIELD IN SOYBEAN PLANT

利用缓释或控释肥料 ,在盆栽条件下研究了大豆生育期间干物质积累、分配、养分吸收和产量的变化 ,结果表明 :生育期间的总干物质的积累 ,结荚期以前所有缓释肥料处理的均高于对照 ,尤以LP -40和LP -70的处理作用明显 ,而结荚后只有LP -40、LP -70和LP -SS1 0 0A 3个处理的干物重高于对照 ;缓释时间短的肥料对氮素的吸收影响不大 ,而时间长的则减少前期的吸收 ,然而 ,缓释或控释肥料均能一定程度的增加K+ 的含量 ,但对PO43 -影响不大。控释肥料LP -SS1 0 0A可增产 2 1 .9% ,而缓释肥料LP -70和LP -1 80A分别增产 1 3 .1 %和 1 2 .2 %。

With slow/controlled release fertilizer, dry matter accumulation/partitioning and nutrients absorption and yield variation in the growing period of soybean were investigated in pot experiments. The results showed that dry matter accumulation during the growing period in all treatments are higher than that of control, especially the LP-40 and LP-70; however, only LP-40, LP-70 and LP-SS100A treatments are higher than control after pod-setting . The controlled release fertilizer with short releasing time have less effect on nitrogen absorption, while the long time one may reduce the nitrogen absorption at the earlier stage. However controlled release fertilizers in general can increase the absorption of K + to a certain extent, but have no effect on absorption of PO 4 3 -. LP-SS100A can increase productivity by 21.9%, LP-70 and LP-180A can increase productivity by 13.1% and 12.2% respectively.