渭北旱塬丰水年春玉米产量潜势及水肥效应研究  

Study on Yield Potentiality of Spring Corn and Effect of Water and Fertilizer in Abundant Rain Year in Wenbei Plateau

作　　者：董大学[1] 邵明安[1] 李玉山[1] 

机构地区：[1]中国科学院水利部西北水土保持研究所,陕西杨陵712100

出　　处：《水土保持通报》1993年第5期17-21,共5页Bulletin of Soil and Water Conservation

摘　　要：采用田间试验方法对渭北塬区春玉米进行旱作产量潜势和水肥效应定量研究,结果表明:该区丰水年份春玉米产量潜势为603.6Kg/亩,产量潜势系数为1.0,自然降水可完全满足春玉米生长需要。在此基础上所进行的人工田间供水(以提高土壤水分水平)会导致水分利用率的降低,但不会造成减产。相反,无论在何种水分条件下培肥地力,不仅可以大幅度提高春玉米产量,还能明显提高水分利用率。Yield potential of nature precipitation and effect of water and fertilizer for spring corn growth had been studied bymeans of field experiment and statistical analysis. Results show that the yield potential was 603. 6kg per mu and thepotential coefficient was 1. 0,which indicated that the water amount was enough to meet the requirement of the cornin abundant rain year,Improving soil fertility is the first measure to increase the spring torn yield and water efficiencyat present. However,increasing water supply will reduce water efficiency but not the yield.

关 键 词：玉米 产量 水肥效应 

分 类 号：S513.01[农业科学—作物学]