秦巴山区土壤中钾素状况的分析及补钾措施  

Analysis on Potassium Status in Soil of Qinba Mountain Area and Measures of Adding Potassium

作　　者：王崇乐 都大俊 张可安 柯小兰 王鸿耀[2] 

机构地区：[1]陕西安康地区土肥站,陕西安康725000 [2]安康农业学校,陕西安康725000

出　　处：《水土保持研究》2001年第1期82-84,共3页Research of Soil and Water Conservation

摘　　要：始于 2 0年前的土壤普查查明 ,陕西省耕地速效钾平均 146 mg/ kg,作为粮油基地的关中地区更高于此。这就掩盖了秦巴山区缺钾的严重性。当时秦巴山地缺钾已占 40 % ,随着耕作水平提高和产量增长 ,秦巴山区耕地缺钾面积已接近 80 %。事实证明 ,缺钾已成为秦巴地区粮食增产的瓶颈。分析了秦巴耕地缺钾的原因和钾肥肥效 。The general survey of soil has been starting twenty years till now,the result show that the average quick acting potassium in farmland is 146 mg/kg in Shaanxi,the central Shaanxi plain,as the grain and soil base,is more higher than that.These phenomena has covered the seriousness of lack of potassium in Qinba mountain area,in fact,the area of lack of potassium was nearly 40% in Qinba mountain area at that time,the area of lack of potassium is nearly 80% in that area with the increase of cultivation level and grain yield.The fact proves that the lack of potassium has become the limitation of increasing grain yield in this area.The general plan for adding potassium is put forward by analysing the reason of lack of potassium and potassium fertilizer efficiency in farmland of Qinba area.

关 键 词：严重缺钾 原因 秦巴山区 土壤钾 补钾 施肥 

分 类 号：S158.5[农业科学—土壤学] S143.3[农业科学—农业基础科学]