玉米杂交种丹玉39号氮、磷、钾肥利用研究

Study on N,P,K Fertilizer Utilization of Maize Hybrid 'Danyu No.39'

采用田间试验方法,在辽宁凤城地区研究氮、磷、钾肥对丹玉39号产量及农艺性状的影响。结果表明:适量增施氮肥可有效提高丹玉39号植株孕穗率,最适施氮(N)量为12 kg/667m2。不同施磷水平对丹玉39号农艺性状及产量的影响差异都不大。最适施磷(P2O5)量为2 kg/667m2即可。随着钾肥用量的增加,行粒数、百粒重略有增加,秃尖略有减小,空秆率有所下降,对其它性状影响不大。最适施钾(K2O)量为8 kg/667m2。氮肥对丹玉39号产量贡献率最高,钾肥次之,磷肥最小。最适N∶P2O5∶:K2O施用比例为:6∶1∶4。

In Liaoning Fengcheng area, a preliminary study the nitrogen, phosphorus and potassium fertilizer by the conventional field experiment method to Danyu No. 39, production and other agronomic traits influence. Results show that moderate increased nitrogen application can effectively improve Danyu No. 39, plant namely, the optimal rate of nitrogen （N） quantity for 12 kg/667m2. Different phosphate level on Danyu No. 39, agronomic characters and yield differences are not influence. The phosphate （P2O5） amount to 2 kg/667m2. Along with the increase of potash, do grain number, 100 grain weight increased slightly, slightly reduced, empty bald pointed to decline, pole rate of other character is little affected. The optimal amount of potassium （K20） for 8 kg/667m2. Nitrogen fertilizer on Danyu No. 39, the highest yield contribution, potassium fertilizer neonatal and phosphate minimum. The optimum N：P2O5：K2O kinds ratio for 6： 1： 4.