干旱冷凉区红芸豆施肥效应与养分吸收研究

Fertilization Effect and Nutrients Absorption of Red Kidney Bean in Dry and Cold Area

应用"3414"试验方案,研究了干旱冷凉区红芸豆施肥效应及红芸豆养分吸收状况。结果表明:施肥处理红芸豆产量显著高于不施肥处理,以N2P1K1处理红芸豆产量和产投比最高。施用氮、磷、钾肥增产率分别为16.4%、8.6%和12.7%,对产量影响依次为:N>K>P。三元二次方程拟合结果表明,本试验条件下,氮(N)、磷(P2O5)、钾(K2O)肥最佳经济施肥量分别为99.0、140.6、108.0 kg/hm2。红芸豆生育期地力贡献率为75.7%,供试土壤肥力中等,施肥效果明显。合理施肥可促进红芸豆对N、P和K的吸收。

In this study,a＂3414＂experiment on red kidney bean was conducted in dry and cold area to studyfertilization effects and nutrients absorption.The results showed that the red kidney bean yield of fertilizationtreatment was significantly higher than that of non-fertilization treatment,yield and output-input ratio ofN2P1K1 reached the highest.The yield increase rates by the application of N,P and K fertilizer were 16.4%,8.6% and 12.7%,respectively,and the fertilization effects on yield followed the order of N K P.Under thecondition of this experiment,the fitting results of the quadratic equations in three variables showed that theoptimum economic application amounts of N,P2O5 and K2 O were 99.0,140.6 and 108.0 kg/hm2.Soil fertilitycontribution rate of red kidney bean at the growing stage was 75.7%,the experimental soil was of middlefertility and the fertilization effect was obvious.Rational fertilization could promote the absorption of N,P andK in red kidney bean.