摘要
为给西南地区小麦高产优质栽培中合理施氮提供依据,以西农麦1号为材料,在西南地区有代表性的中性紫色土上,研究了施氮对小麦氮素吸收利用及产量和品质的影响。结果表明。施氮在0~225kg/ha范围内,随氮肥用量的增加,小麦对氮的吸收量、籽粒粗蛋白质含量、籽粒产量和茎叶干重都显著增加,但氮的收获指数和氮肥的农艺效率却呈下降趋势。小麦各处理氮肥利用率平均为39.6%,以施纯氮75kg/ha水平最高。施氮对改善小麦的品质作用明显,其中籽粒淀粉含量以施纯氮量150kg/ha时最高。
We studied the effects of N fertilizer(NF) applications on N absorption and quality of wheat in the representative neutral purple soil of southwest China. The results indicated that when the N ap plication increase within the range of 0~225 kg/ha absorption of nitrogen, the crude protein content of grain, grain yield and stem-leaf yield of wheat will grow tremendously, while the agronomic efficiency and harvest index of nitrogen fertilizer show downtrend. All these prove that N aborbed is mainly contained in stem-leaf, and the removal and burning of straws would cause more N loss. The average utilization rate of NF is 39.6%, among which N application of 75 kg/ha gains the highest was gained. N application would remarkably improve wheat quality, the starch content of wheat grain is highest when NF application is 150 kg/ha.
出处
《麦类作物学报》
CAS
CSCD
北大核心
2006年第5期167-169,共3页
Journal of Triticeae Crops
基金
农业部948重大国际合作项目(2003-Z53)
柑桔无病毒繁育体系完善及无公害高效栽培技术开发项目(2005EP090003)
柑桔引进良种产业技术配套示范推广项目(2004-C16-01)