湖北省小麦施钾效果及钾利用效率研究  

Study on Potassium Effect and Potassium Use Efficiency of Wheat in Hubei Province

作　　者：余宗波 邹娟[2] 鲁剑巍[2] 童军 鲁明星 李小坤[2] 

机构地区：[1]湖北省土壤肥料工作站,武汉430070 [2]华中农业大学资源与环境学院,武汉430070

出　　处：《湖北农业科学》2011年第8期1526-1529,共4页Hubei Agricultural Sciences

基　　金：国家"十一五"科技支撑计划重点项目(2008BADA4B08);国家测土配方施肥项目(财政部财农[2008]21号)

摘　　要：通过70组田间试验研究了湖北省主产区小麦施钾的增产、增收效应及钾利用效率。结果表明,增施适量钾肥具有显著的增产增收效果,小麦平均增产556～978 kg/hm2,增产率为9.5%～16.7%;施钾平均增加经济收益192～897元/hm2,产投比为1.2～4.7;钾的偏生产力和农学效率分别为71.0 kg/kg和7.4 kg/kg。应用直线加平台模型拟合小麦产量与钾用量的关系,求得湖北省小麦钾的最佳用量平均约为87 kg/hm2。Seventy field trials of potassium（K） fertilizer application to wheat were conducted in Hubei province.The effect of K fertilization on yield,profit of wheat,and K use efficiency of wheat in Hubei province were studied.The results showed that K application promoted both the yield and profit of wheat significantly.The average yield increment with K fertilization was 556～978 kg/hm2 and the increasing rate was 9.5%～16.7%.Compared to the control（no K treatment）,profit of K application increased 192～897 yuan/hm2 and the value cost ratio（VCR） averaged 1.2～4.7.The partial factor productivity of applied K（PFPK） and agronomic K use efficiency（AEK） averaged 71.0 and 7.4 kg/kg K2O,respectively.According to linear plus platform model,the average optimum K application rate was 87 kg K2O/hm2 for wheat in Hubei province.

关 键 词：小麦 钾 产量 经济效益 钾利用效率 

分 类 号：S512.110.62[农业科学—作物学]