冀西北高原旱地追氮梯度对饲用青玉米产量及品质的影响

为给冀西北高原饲用青玉米大面积种植提供科学的施肥依据,本研究就追氮对饲用青玉米产量及品质的影响进行了分析。结果表明,追氮可显著提高饲用青玉米的产量以及秸秆粗蛋白、真蛋白和氨基酸含量。追氮138kg/hm2时,白马牙玉米的鲜重和干重产量都达最高,分别为45089.9kg/hm2和9378.7kg/hm2,氮肥的增产效果也最高,每施1kg氮可增加干重40.44kg;同时,玉米秸秆粗蛋白、真蛋白含量分别为7.84%和1.97%,比对照分别增加了105.2%和131.1%;秸秆赖氨酸含量高达0.28%。

Effect of Nitrogen on Yield and Quality of Forage Green Maize in Northwest Dry-land in Hebei Province

The effect of different nitrogen applied amounts on yield and qual ity of forage green maize were studied. The result showed that Yield and straw c rude protein contents and true protein contents and amino acid contents of forag e green maize were obviously increased after nitrogen application. When the amou nt of application was 138 kg/ha, forage green maize wet yield and dry yield were 45 089.9 kg/ha and 9 378.7 kg/ha respectively, straw crude protein contents and true protein contents were 7.84% and 1.97% that were more 105.2% and 131.1% tha n CK respectively, Lys contents was 0.28%.