摘要
对银杏不同生长发育时期种子中氮、磷、钾、钙、镁等８种矿质营养元素含量的动态变化研究结果表明：银杏种子中氮、磷、钾、钙、镁５种大量营养元素的含量变化，随时间呈从高到低的规律性变化，但不同元素间变化的幅度不同，整个生长季中４月底至５月中旬、５月下旬至６月上旬是银杏种子中营养元素含量变化较大的两个阶段．成熟种子中８种主要营养元素含量分别是氮１．０４％、磷０．１３％、钾１．４９％、钙０．１３％、镁０．０９％、锰３．２２ｍｇ·ｋｇ－１、锌２７．５５ｍｇ·ｋｇ－１、铁１０．
The contents of N,P,K,Ca,Mg,Zn,Fe,Mn in Ginkgo biloba seeds were determined and analyzed. The results show that the annual variations in contents of N,P,K,Ca,Mg present a gradual decreasing trend from spring to autumn, but the decreasing range of each element is different with different growing stages of seeds. From the end of April to the middle of May and from the end of May to the begining of June are two drastically decreasing periods in contents of elements during the whole growing season.The contents of elements in mature seeds are N 1.04%,P 0.13%,K 1.49%,Ca 0.13%,Mg 0.09%,Zn 27.55mg·kg-1,Fe 10.0mg·kg-1,Mn 3.22mg·kg-1.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1998年第4期116-118,共3页
Journal of Beijing Forestry University
基金
林业部经济林长效复合肥研制项目
