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:毛永民[1] 范培格[1] 贾立涛 申连英[1] 周俊义[1]
机构地区:[1]河北农业大学中国枣研究中心,保定071001
出 处:《河北农业大学学报》1999年第4期55-57,共3页Journal of Hebei Agricultural University
基 金:河北省自然科学基金!397143
摘 要:本研究对河北省赞皇县、高邑县、望都县、河北农业大学标本园等地枣树的VA菌根自然侵染率进行了调查。结果表明:所调查的枣树均有VA菌根菌侵染,但VA菌根的自然侵染率因立地条件、树龄、品种不同而异。树龄越大,侵染率越高;土壤肥力高或过低均不利菌根菌的侵染。Natural occurrence of vesicular-arbuscular mycorrhizal (VAM) fungi in Chinese jujube trees was investigated in Zanhuang, Gaoyi, Wangdu county and the garden of Hebei Agricultural University. The results showed that VAM fungi were present on all the trees but the percentage infection varied with locality, variety and the age of the trees. The older the trees, were the higher the percentage infection bacame. The trees planted in both fertile and sterile soil had lower percentage infection.
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:216.73.216.229