栽培措施对粮饲兼用型玉米粗蛋白积累的影响  

Effects of Different Cultivation Measures on Crude Protein Accumulation of Grain and Forage Maize

作　　者：张永平[1] 刘景辉[1] 焦立新[1] 庞云[2] 郭顺美[2] 乌兰[3] 翟利剑[4] 

机构地区：[1]内蒙古农业大学农学院,呼和浩特010019 [2]呼和浩特市园艺科技试验中心,呼和浩特010070 [3]包头市农业科学研究所,包头014013 [4]解放军防化指挥工程学院,北京102205

出　　处：《西北农业学报》2008年第2期90-94,100,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：内蒙古呼和浩特市科技攻关计划项目“呼和浩特市优质饲用作物种植与加工利用技术研究及产业化开发”(编号:2003-1-农社-07);内蒙古科技推广项目“优质高产饲用作物新品种示范推广”(20051002)

摘　　要：采用3因素最优饱和设计,研究了氮肥、磷肥与种植密度3因素对不同收获时期粮饲兼用玉米粗蛋白变化的影响。结果表明,不同收获时期粗蛋白含量变化因器官而异。从散粉期开始,叶片中粗蛋白含量呈下降趋势,茎鞘和雌穗中粗蛋白含量均呈单峰曲线变化,峰值分别出现在灌浆期和乳熟末期,全株最大粗蛋白积累量出现在乳熟末期。散粉期粗蛋白主要分配在叶片和茎鞘中,灌浆期后雌穗中粗蛋白积累量迅速增加。从营养品质角度考虑,呼和浩特地区粮饲兼用型玉米适宜的收获期为乳熟末期,优化栽培措施为种植密度5 200-5 700株/hm^2,施氮量（纯N）260-330 kg/hm^2,施磷量（P2O5）110-150In this trial, effects of N fertilizer amount, P fertilizer amount and plant density to crude protein of grain and forage maize in different harvest periods were studied, applying 3 factors optimum saturation designing. It showed the crude protein contents were different with organs in different harvest periods. From the scattering stage, the crude protein content dropped in leaves, showed singlepeaked curve in stem and spike, the maximum value were in filling stage and end milk stage, respectively. The maximum value of crude protein content in whole plant was in end milk stage. Crude protein mainly accumulated in leaves and stems in scattering stage, accumulated in spikes after filling stage. From nutrient angel, the best harvest period is end milk stage, and the suitable density is 5 200 -5 700 plant/hm^2, the suitable N and P amounts were 2604330 kg/hm^2 and 110-150 kg/hm^ 2 in Hohhot.

关 键 词：粮饲兼用玉米 粗蛋白 栽培措施 

分 类 号：S513[农业科学—作物学]