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
机构地区:[1]甘肃省农业厅,甘肃兰州730000 [2]甘肃农业大学草业学院,甘肃兰州730070 [3]中国农科院土肥所,北京100081 [4]云南省曲靖市麒麟区畜牧局,云南曲靖655000
出 处:《草业学报》2002年第2期91-94,共4页Acta Prataculturae Sinica
基 金:"九五"国家科技攻关项目"云贵高原草地畜牧业持续发展技术研究"(编号 96- 0 1 6- 0 2 - 0 1 )部分内容
摘 要:探讨了红壤人工草地定植期的主要肥力限制因子 ,通过对施肥效应的动态监测 ,构建了人工草地定植期的施肥模型 ,并确定出经济合理的施肥量。结果表明 :在施肥效应中 ,白三叶 - P素效应最显著 ,白三叶与施磷量间呈显著正相关 (r=0 .6 6 ) ;同时白三叶 - K素效应也较显著 ,白三叶与施钾间的相关性 r=0 .5 0。定植期在混播人工草地中 ,经济合理的最佳施肥量为纯磷 95 .4 kg/ hm2 ,纯钾 13.9kg/ hm2 ;在单播人工草地中 ,黑麦草经济合理的最佳施肥量为纯磷 83.4 kg/ hm2 ,纯钾 13.8kg/ hm2 。The critical fertilizer factor was studied in the establishment stage of the red soil fertilizer. Under pasture yield, monitoring the fertilizer model and the economical fertilization were determined. The results showed that the phosphorus was the critical fertilizer factor for establishing pasture in red soil region and the marked increasing production was made by the phosphate fertilizer. Among the fertilization effect, the white clover phosphorus was the best ( r =0.66), followed by white clover potassium( r =0.50) and white clover calcium. During three years, compared with P0K0, the increased pasture yield was obtained by P180K0. In establishment stage ,for mixed sown pasture, the economical fertilization was pure phosphorous 95.4 kg/hm 2 and pure potassium 13.9 kg/hm 2 ; for single sown pasture, ryegrass economical fertilization was pure phosphorus 3.4 kg/hm 2 and pure potassium 13.8 kg/hm 2 .
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:216.73.216.38