不同化肥施用量对冷浸田水稻产量效应的研究

摘要

During 2011~2012, the author studied the effect of chemical fertilizer (N, P, and K fertilizer) application rate on the growth and yield of rice in cold waterlogged field in Southern Jiangxi .The results indicated that:the optimal application rate of chemical fertilizer was N 144.5~161.1 kg/hm2, P2O5 76.8~78.1 kg/hm2, K2O 119.4~163.1 kg/hm2 for early-season rice, and N 167.8~172.6 kg/hm2 , P2 O5 77.0~99.5 kg/hm2 , K2 O 159.5~160.7 kg/hm2 for late-season rice;the proper proportion of fertilizer N, P2O5, K2O was 1∶(0.48~0.53)∶(0.82~1.01) for early-season rice, and 1∶(0.46~0.58)∶(0.93~0.94) for late-season rice .%于2011～2012年研究了氮、磷、钾肥不同施用量对赣南冷浸田水稻生长发育和产量的影响。试验结果表明：早稻的最佳施肥量为氮144．5～161．1 kg／hm2、磷（P2O5）76．8～78．1 kg／hm2、钾（K2O）119．4～163．1 kg／hm2；晚稻的最佳施肥量为氮167．8～172．6 kg／hm2、磷77．0～99．5 kg／hm2、钾159．5～160．7 kg／hm2；早稻的合理施肥比例为氮∶磷（ P2 O5）∶钾（K2O）＝1∶（0．48～0．53）∶（0．82～1．01），晚稻为氮∶磷（P2O5）∶钾（K2O）＝1∶（0．46～0．58）∶（0．93～0．94）。