摘要
新疆呼图壁种牛场地区草地２５ 种植物中的Ｋ、Ｎａ、Ｃａ、Ｍｇ、Ｓ在含量水平上Ｎａ＞ Ｓ＞ Ｋ＞Ｍｇ＞ Ｃａ。不同植物种类Ｎａ、Ｓ含量差异较大，如盐节木（Ｈａｌｏｃｎｅｍ ｕｍ ｓｔｒｏｂｉｌａｃｅｕｍ ）、囊果碱蓬（Ｓｕａｅｄａ ｐｈｙｓｏｐｈｏｒａ）等Ｎａ、Ｓ含量分别达１０００００ ｐｐｍ 和３００００ ｐｐｍ 以上，而芦苇（Ｐｈｒａｇ－ｍ ｉｔｅｓｃｏｍ ｍ ｕｎｉｓ）、獐茅草（Ａｅｌｕｒｏｐｕｓｌｉｔｔｏｒａｌｉｓ）Ｎａ、Ｓ含量分别在３００００ ｐｐｍ 和４０００ ｐｐｍ 以下；种间变异系数Ｎａ、Ｓ分别为９５．１０％ 、６３．１６％ ，Ｋ 含量变异系数较小，为３４．４２％ 。同一种植物在不同地点Ｎａ、Ｋ、Ｃａ、Ｓ含量的变化，小于种间的变化；部分植物Ｍｇ 含量的变化种内大于种间。相关分析表明，植物与土壤元素含量之间，在７ 种植物物中，仅白刺（Ｎｉｔｒａｒｉａ ｓｉｂｉｒｉｃａ）与土壤Ｎａ含量之间呈显著负相关水平；植物中５ 种元素之间的相互关系，Ｎａ、Ｃａ 之间呈比较显著负相关水平，Ｎａ、Ｓ之间呈比较显著正相关水平。用植物中５ 个元素的含量，对２５ 种植物进行ＴＷＩＮＳＰＡＮ 分类和ＤＣＡ 排序，结果显示出盐节木、囊果碱蓬、盐爪爪（Ｋａ?
The characteristics on K, Na, Ca, Mg and S contents of 25 plant species were analysed at the grassland on the Hutubi Cattle Stock Farm area, Xinjiang.The level of content is in the order of Na>S>K>Mg>Ca.Different plant species have considerable variation in contents of Na and S, for example, the contents of Na and S are more than 100000 ppm and 30000 ppm respectively in Suaeda physophora and Halocnemum strobilaceum and less than 30000 ppm and 4000 ppm respectively in Phragmites communis and Aeluropus littoralis; their interspecific coefficient of variation (c.v.) are 95 10% and 63 16% respectively.The interspecific c.v.of K content, 34 42%, is the lowest.The contents of K, Na, Ca and S in all innerspecific plants at different sites are less various than interspecific ones; the content of Mg in some innerspecific plants is more various than in interspecific ones.The analysis of correlation between contents of elements in plants and soil shows that Nitraria sibirica is the only plant specie whose coefficient of correlation (c.c.) of Na content in plant with that in soil reaches the significant negative level in seven plant species; among 5 elements in plants, the c.c.between Na and Ca reaches the significant negative corrrelative level, the c.c.between Na and S reaches the significant positive correlation level.The results of classification and ordination of TWINSPAN and DCA of 25 plant species using the data of 5 elemental contents show that seven plant species, for example, H.strobilaceum, S.physophora, Kalidium foliatum, K.caspicum, etc.are Na and S type plant; Phragmites communis, Achnatherum splendens, etc.are Na and K type plant.
基金
国家自然科学基金
关键词
草地
植物
元素
含量
数量分析
Grassland
Contents of elements in plant
Quantitative analysis
