吉林省大豆施肥指标体系初步建立

Preliminary Raising Fertilization Index System for Soybean in Jilin Province

通过吉林省2006～2008年大豆"3414"肥料效应试验,建立了大豆施肥技术指标体系。应用养分丰缺指标法,将大豆相对产量与相应土壤养分含量分别进行方程拟合,根据方程曲线的趋势,选择一元二次方程或线性加平台方程分别计算出最大施肥量和最佳施肥量,通过概率分布得出不同养分等级下的施肥量范围。吉林省大豆种植区土壤碱解氮、速效磷和速效钾平均含量分别为184、19.5、116 mg.kg-1;N、P2O5、K2O最大平均施用量分别为45、56.5、44 kg.hm-2,最佳平均施用量分别为42、47、40 kg.hm-2。

In order to establish soybean fertilization index system from the＂3414＂fertilizer trail in Jilin in 2006-2008,then applying the nutrient abundance and deficiency indicator method,which are fitted to equation corresponding with the relative yield of soybean and the soil nutrient content,according to the trend curve equation,choosing the Quadratic or the Linear plus plateau were calculated the most fertilization and the economic fertilization from the probability distribution obtained the scope of fertilization in the different nutrient levels.The avai-N、avai-P、avai-K is 184、19.5 and 116 mg·kg-1 respectively in Jilin soybean-growing area,the average most N、P2O5、K2O application is 45、56.5、44 kg·ha-1;the average economic application is 42、47、40 kg·ha-1.