摘要
根据渭北旱塬合阳旱棚冬小麦微区试验结果，分析了不同降水年型下不同施肥技术的冬小麦增产效应、肥料利用率和冬小麦生育期土壤供氮状况（以ＮＯ－３－Ｎ含量为指标）。结果表明歉水年型下施肥技术为７月中旬一次深施，平水年型下施肥技术为８月中旬一次深施，丰水年型下施肥技术为９月中旬一次深施，施肥深度均为１５ｃｍ。同时播前播时一次施肥可满足冬小麦强度营养期的需要，而分次施肥则难以满足。
According to the results of micro field fertilizer test of winter wheat under greenhouse in Heyang county on Weibei Rainfed Highland, the yield response、fertilizer use efficiency and soil NO - 3-Nsupply of winter wheat during growing periods were analyzed. The analysical results indicated three fertilizations with a depth of 15 cm under low, common and high annual precipitations were conducted in mid July, mid August and mid September, respectively. Only one fertilizer supply at presowing stage could meet the need of nutrition intensity period, but separate fertilizer supplies may did not.
出处
《干旱地区农业研究》
CSCD
北大核心
1998年第4期15-20,共6页
Agricultural Research in the Arid Areas
基金
国家"八五"旱农科技攻关项目
关键词
冬小麦
施肥技术
降水年型
渭北旱塬
winter wheat, fertilizer practice, annual precipitation, Weibei Rainfed Highland
