摘要
利用灰色关联分析方法对九段沙上沙海三棱藨草中营养元素含量与不同深度土壤相应元素含量的关联度进行分析，旨在了解海三棱藨草生长过程对不同深度土壤营养元素的吸收程度.结果显示，海三棱藨草生长过程中与深层土壤中N，P，K元素含量关联最密切，关联度顺序是40～60 cm＞15～40 cm＞0～15 cm.与土壤营养元素含量的关联序为N＞K＞P，生长过程吸收的N元素最多，其次是K元素，吸收的P元素最少.不同生长阶段对营养元素的需求程度不同，生长初期与N元素含量关联最密切，旺盛生长期与N，P，K元素含量关联均密切，生长末期与N元素含量的关联程度减小，与P，K元素含量的关联程度增加.
Gray correlation method was applied to analyze the correlation degree between nutrient elements in Scirppus mariqueter and corresponding elements in different depths of soil in the upper shoal of Jiuduansha, in order to understand the absorbing extent of Scirppus mariqueter from different depths of soil in the process of growth. Results showed that elements N, P, K of the plant were more closely correlated with the deeper soil, and the correlation was with the order of 40 - 60 cm 〉 15 - 40 cm 〉 0 - 15 cm. The correlation with soil nutrient elements was in the order of N 〉 K 〉 P ; in the growth process of the plant, N was absorbed the lnOSt from the soil, K was secondly, and P was the least. In different growth periods, different nutrient elements were needed by the plant. At the beginning growth period, N was the main to plant growth, at the blooming period, elements N, P, K were all important to plant growth, and at the end of growth period, element N was gradually faint, and elements P, K had closer correlation with plant .
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2008年第4期145-150,共6页
Research of Environmental Sciences
基金
2004年上海市科学技术委员会重大攻关项目(04DZ19302)
国家自然科学基金项目(40771013)
关键词
灰色关联分析
N
P
K
海三棱藨草
九段沙上沙湿地
gray correlations analysis
N
P
K
Scirppus mariqueter
upper shoal of Jiuduansha
