青贮玉米不同生育期营养成分、生物产量和适宜收获期研究

以中北410为试验材料,在玉米生育期不同阶段取样化验植株粗蛋白含量、粗脂肪含量、粗纤维含量和植株质量,以进行植株养分含量和质量的动态监测。结果表明,玉米植株粗蛋白含量随生育期延迟趋于降低;粗脂肪含量则随生育阶段推进而增加,到乳熟期达到最高值,之后下降;粗纤维含量在乳熟期前变化不大,之后含量增加;植株生物产量在乳熟期前,随生育期延长,质量增加,之后开始减少。种植青贮玉米最适宜收获时期是在玉米籽粒乳熟期。

Study on Nutrient,Plant Weight and Suitable Harvest Period of Silage Maize at Different Growth Stage

The contents of plant crude protein,crude fat,crude fiber and plant weight in different growth stage of Silag maize zhongbei 410 were analyzed.The results showed that the accumulation amounts of crude protein tended to reduce with plant growing development,while the content of crude fat increased and reached the maximal value in milk stage,then it reduced;the crude fiber content increased after milk stage.The change of plant weight was the same as crude fat.The most suitable harvesting period was milk stage as silage maize.