不同灌水方式和施肥量对青贮玉米生长和产量的影响

青贮玉米是河北省粮改饲的主要目标作物。为制定合理的水肥管理措施,提高青贮玉米的产量,选取灌水方式和施肥量作为因子进行青贮玉米试验。灌水方式设置畦灌和沟灌两个水平,施肥量设置4个水平,肥料用量在300~750 kg/hm^+2之间。研究结果表明,沟灌与畦灌相比,株高和鲜重分别增加2.2%和3.6%,沟灌有利于青储玉米的生长和产量的提高。施肥量对青储玉米的生长和产量影响显著,施肥量600 kg/hm^+2时青储玉米生长状况和产量最好,与750、450和300 kg/hm^+2施肥量水平相比,株高、叶面积指数、叶绿素和鲜重分别增加0.11%~27.8%、4.01%~10.55%、1.1%~1.8%和3.6%~15.6%。青储玉米鲜重产量介于69.09至81.4 t/hm^+2之间。相关性和回归分析结果表明青储玉米鲜重与株高和叶面积指数之间呈极显著正相关,沟灌、施肥量600 kg/hm^+2的处理组合有助于株高和叶面积生长,因此也有助于获得较高的青储玉米产量。

Effects of Different Irrigation Methods and FertilizationAmount on Growth and Yield of Silage Corn

Silage corn is the main target crop for grain reforming and planting structure adjustment in Hebei Province.In order to formulate reasonable water and fertilizer management measures and increase the yield of silage corn,the irrigation method and fertilization amount are selected as factors affecting the silage corn experiments.The irrigation method is set to two levels of border irrigation and furrow irrigation,and the amount of fertilizer is set at 4 levels,and the amount of fertilizer is between 300 and 750 kg/hm^+2.Research indicates that compared with border irrigation,the plant height and fresh weight have increased by 2.2%and 3.6%,respectively,furrow irrigation is conducive to the growth and yield of silage corn.The amount of fertilizer applied has a significant effect on the growth and yield of silage corn.The growth status and yield of silage corn are the best when the fertilizer application rate is 600 kg/hm^+2,compared with 750,450 and 300 kg/hm^+2 fertilization levels,plant height,leaf area index,chlorophyll and fresh weight have increased by 0.11%to 27.8%,4.01%to 10.55%,1.1%to 1.8%and 3.6%to 15.6%,respectively.The fresh weight yield of silage corn is between 69.09 and 81.4 t/hm^+2.Correlation and regression analysis show that there is a significant positive correlation between fresh weight of silage corn and plant height and leaf area index,the treatment combination of furrow irrigation and fertilization of 600 kg/hm^+2 contributes to plant height and leaf area growth,and therefore also contributes to higher yield of silage corn.