不同氮、磷水平对耐密型玉米籽粒产量和营养品质的影响

以耐密型玉米品种“吉单209”为试材,研究了不同氮、磷用量对玉米籽粒产量和营养品质的影响。结果表明:不同氮、磷营养水平对玉米籽粒产量影响较大,本试验条件下适宜的施肥量为N 200 kg/hm2、P2O560 kg/hm2、K2O 50 kg/hm2,经济施氮量为174.4 kg/hm2。氮肥对玉米籽粒蛋白质含量、赖氨酸含量的影响明显,在施磷30 kg/hm2时,施氮250 kg/hm2比施氮100 kg/hm2处理蛋白质含量增加3.9%,蛋白质产量增加10.1%。在一定的范围内玉米籽粒脂肪含量随氮肥施用量的增加而增加,在相同氮水平时,随着施磷量的增加玉米籽粒脂肪含量增加。

Effect of Nitrogen, Phosphorus Levels on Grain Yield and Qualities of Compact Corn

The effects of different nitrogen and phosphorus application on grain yield and qualities of compact corn Jidan 209 were studied.The results showed that a significant difference in grain yield of corn at different levels of nitrogen and phosphorus application was found.Under this experiment condition,the suitable application amount of N,P_2O_5 and K_2O was respectively 200 kg/hm~2,60 kg/hm~2 and(50 kg/hm~2),and the economical N application amount was 174.4 kg/hm~2.The effect of N application on corn grain protein content and lysine content was observed.When P amount was(30 kg/hm~2),to vary N amount from 100 kg/hm~2 to 250 kg/hm~2,corn grain protein content would increase by 0.33% and yield would increase by 10.1%.With the increase of N amount,corn gain oil content increased within certain level.With the increase of P amount,corn gain oil content increased in the same N level.