摘要
通过人工控制模拟试验,研究了植物中全氮与全磷之比（植物N/P）和土壤pH值与湿地植物物种丰富度的关系.结果表明,湿地物种丰富度与植物N/P之间呈单峰变化关系,当2.0〈N/P〈9.5,物种丰富度随着N/P的增加而增加;当N/P约等于9.5时,氮、磷的有效性达到平衡,物种丰富度最高;N/P〉9.5时,氮、磷供应平衡系统可能被破坏,湿地物种逐渐减少.物种丰富度与土壤pH值表现为显著的正相关关系（R^2=0.526）,当pH值为5.6～6.8时,物种丰富度随着土壤pH值增加而增加.通过方差分析,土壤pH值和植物N/P对物种丰富度的影响分别为37.96%和15.29%.
The influence of plant N/P, soil pH value on wetland plant species richness was studied through artificial control simulating test. The relationship of species richness and plant NfP （total N and total P ratio） was unimodal. The plant species richness increased with increase of N/P at 2.0〈N/P〈9.5, the availability of N and P reached balance and the species richness was the highest when N/P=9.5, At N/P〉9.5 the supply balance system might be destroyed and wetland species decreased gradually. The species richness had marked positive correlation with soil pH value （R^2=0.526）; and increased with increasing soil pH value at pH of 5.6-6.8. Through variance analysis, the influence of soil pH value and plant N/P on the species richness was 37.96% and 15.29% respectively.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2006年第3期346-349,共4页
China Environmental Science
基金
中国科学院知识创新工程项目(KZCX3-SW-332)
