不同豆科牧草对低缓冲土壤的酸化能力  

Pasture Legume Species Differ in Their Capacity to Acidify\=a Low-Buffer Soil

作　　者：方日尧[1] TANE.C RAPHAEL.C 

机构地区：[1]陕西省农业科学院 [2]澳大利亚西澳大学地中海豆科研究中心

出　　处：《北京农学院学报》1999年第3期1-5,共5页Journal of Beijing University of Agriculture

摘　　要：在盆栽试验中，使用差的缓冲沙土比较Ｓｕｂｃｌｏｖｅｒ，Ｍｅｄｉｃｓ，Ｓｅｒｒａｄｅｌａ，Ｂｉｓｅｒｒｕｌａ和Ｗｏｏｌｙｃｌｏｖｅｒ固氮的酸化潜力，植物生长７、９、１１周后，这些豆科牧草的酸化率，地上部分４４～１４５ｃｍｏｌ／ｋｇ种间变化非常大．Ｓｕｂｃｌｏｖｅｒ和Ｓｅｒｒａｄｅｌａ比Ｗｏｏｌｙｃｌｏｖｅｒ和Ｍｅｄｉｃｓ表现较大的酸化能力，而Ｂｉｓｅｒｕｌａ酸化能力最低，酸化率在地上部不仅与过量阳离子和钙浓度有关，而且与灰碱有关．因此，地上部分总钙，过量阳离子和灰碱含量为土壤产生总的Ｈ＋提供了好的指示．Acidification potential of sub clover (Trifolium subterraneum L.cv.Clare),medics(Medicago murex Willd.cv.Zodiac),serradella(Ornithopus sativus Brot.line SP1/13),biserrula(Biserrula pelecinus L.line Mor99)and woolly clover (Trifolium tomentosum L.)under N2 fixation was compared in a pot experiment using a poorly-buffered sandy soil.The acidification rate of these pasture legumes was considerable,ranging from 44 to 145 cmol per kg shoot,after plants had grown for 711 weeks but varied greatly with species.Sub clover and serradella appeared to have greater acidification capacity than wooly clover and medics while biserrula had the lowest.The specific acidification was correlated with excess cation and calium concentrations in shoots but not with ash alkalinity.Furthermore,total calcium,excess cation and ash alkalinity contents in shoots gave good indicators for total H+ production in soil.\=

关 键 词：土壤酸化 豆科牧草 种间差异 灰碱 

分 类 号：S54[农业科学—作物学]