检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:潘茂华 李元洪 郭剑 PAN Maohua;LI Yuanhong;GUO Jian(Henan Sericulture Research Institute,Zhengzhou,45008)
机构地区:[1]河南省蚕业科学研究院
出 处:《北方蚕业》2019年第4期41-43,共3页North Sericulture
摘 要:为更好地推广配方施肥,对河南省桑蚕生产重点县进行了桑园土壤主要养分含量测试分析,发现淅川、内乡两地桑园土壤缺乏有机质,速效磷、速效钾含量较低,全氮含量较高,今后应增施有机肥和磷钾肥,施用桑园专用肥。To better popularize formula fertilization,the major nutrients content in mulberry orchard soil was determined and anlysed in Henan silkworm production key counties.It was found that the orchard soil in Xichuan and Neixiang lacked organic matter,the available phosphorous and available potassium was relatively low,the total nitrogen content was high.It is suggested to increase the application of organic matter and phosphorous and potassium,and to apply special fertilizer to mulberry orchard.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.7