渭北旱塬春玉米生产力及其水分条件评价  

An Evaluation of Yield Potentiality of Spring Corn and Its Water Conditions on Weibei Rainfed Highland

作　　者：董大学[1] 李玉山 

机构地区：[1]中国科学院西北水土保持研究所,陕西杨陵712100 [2]水利部西北水土保持研究所,陕西杨陵712100

出　　处：《西北农林科技大学学报（自然科学版）》1993年第S1期108-112,共5页Journal of Northwest A&F University(Natural Science Edition)

摘　　要：田间试验表明,渭北旱塬春玉米最大生产力为8350.5kg/hm^2,需水量为442.2mm。根据自然降水总量及降水分布与春玉米、冬小麦需水量及需水规律的关系,适当扩大春玉米种植面积,不仅可增加粮食产量,而且可保持农田良性的物质、能量循环体系。The field experiments showed that on the Weibei Rainfed Highland the maximum yield potentiality of spring corn could be 8 350. 5 kg/hm2,and water requirement was 442. 2mm. Based on the relations between natural precipitation and water requirement by spring corn,the reqularity and demand by spring corn and winter wheat,it is considered that suitable to expand the area under planting spring corn will not only increase grain yield,but also maintain a good cycle system of materials and energy in farmlands.

关 键 词：渭北旱塬 春玉米 最大生产力 水分状况 

分 类 号：S[农业科学]