追氮及收获期对饲用青莜麦产量及秸秆蛋白质含量的影响

就追氮和收获期对3个青莜麦品种的产量和秸秆蛋白质含量的影响进行研究。结果表明,追氮可显著提高青莜麦产量和秸秆的蛋白质含量。沙地追氮69 kg/hm2时增产显著,青莜麦干重产量达6 023.4 kg/hm2,滩地青莜麦的产量最高,干重产量达9 013.4 kg/hm2;追氮69 kg/hm2,沙地青莜麦秸秆中粗蛋白和真蛋白含量分别为12.09%和7.45%,比对照提高了6.81和3.61个百分点;追氮量在69 kg/hm2水平上,每增加69 kg/hm2,青莜麦秸秆中粗蛋白质和真蛋白的增幅均显著下降。乳熟早期收获的青莜麦产量最高,品16的干重产量达10 916.7kg/hm2,9348的干重产量达10 700.0 kg/hm2;乳熟早期收获,粗蛋白向真蛋白的转化率最高。

Effect of nitrogen fertilizer and harvest stage on yield and quality of forage green naked oat

The effect of different nitrogen applied amounts and harvest stages on yield and quality of forage green naked oat were studied.The results showed that nitrogen fertilizer could increase the yield and protein contents in the straw of oat.When the amount of nitrogen application was 69 kg/hm~2,the dry weight of forage green naked oat in sandy soil were 6 023.4 kg/hm~2,being higher than CK;and the yield in medium loam meadow soil was the highest,being 9 013.4 kg/hm~2.Under the treatment of 69 kg/hm~2 nitrogen,the crude protein contents and true protein contents in the straw were 12.09% and 7.45% respectively,being 6.81% and 3.61% more than CK respectively.The yield of forage green naked oat was the highest when harvested at early milk stage.The dry weight of Pin16 and 9348 was 10 916.7 kg/hm~2 and 10 700.0 kg/hm~2 respectively.The transformation rate from crude protein to true protein was the highest when forage green naked oat was harvested at early milk stage.