摘要
根据夏季休闲期降水和2m土层声效储水量。可将渭北旱原冬小麦生产年度底墒划分为丰、平、歉不同年型。采用二次通用旋转和最优设计,在渭北旱原的蒲城、白水等县开展了多年多点试验,建立了不同底墒年型氮,磷肥效应方程,并绘制出了不同产量指标的等产线图,提出了不同底墒年型和不同地力水下的氮、磷最佳施用量和配比的量水配方施肥技术指标。经大面积生产示范验证,增产14.7—28.1%。
Based on rainfall water and available soil moisture stored in 2-meter soil layer duringsummer fallow,base soil moisture in winter wheat producing years on Weibei RainfedHighland can be classified into various type years of moisture rich,average and poor insoils.Quadratic general rotations and optimum designs were adopted to carry outmultiple-point experiments for many years in Pucheng and Beishui counties on WeibeaRainfed Highland.on the basis of which,the equations of N and P effects for base soilmoisture in various year types were established,and the isoline diagrams of different yieldindexes were drawn.Meanwhile,the optimum amount of N and P application to differentland fertility in different year types of base moisture in soils and technical indexes of formu-la moisture measurements were suggested in the paper.The demonstrations on large areasindicated that the yield increasing rates were 14.7-28.1%.
出处
《干旱地区农业研究》
CSCD
北大核心
1991年第1期9-16,共8页
Agricultural Research in the Arid Areas
关键词
小麦
施肥
氮肥
磷肥
施用量
fertilizer applicalion techniques
N/P:the optimum amount of fertilizer application
dryland winter wheat
