不同牧草在四种土壤上的生长状况及其对土壤含水量的影响  

Growth of Different Herbages on Four Types of Soil and Influence to Water Retention

作　　者：周朝彬[1] 胡庭兴[1] 武卫国[1] 黄少虎 

机构地区：[1]四川农业大学林学园艺学院 [2]南充市林业局,四川南充637000

出　　处：《四川农业大学学报》2007年第4期406-409,414,共5页Journal of Sichuan Agricultural University

基　　金：四川省教育厅重点学科建设项目(SZ2003)

摘　　要：选取川西地区具有代表性的初育土(由花岗岩发育而成)、黄壤(取自坡耕地)、泥性紫色土(取自成熟水杉林下)和紫色石骨子土(由紫色砂岩发育而成)作为供试土壤,盆栽试验研究了4种土壤类型对不同牧草生长状况的影响,比较了土壤间含水量和牧草对4种土壤含水量的影响。试验结果表明:①初育土上的各牧草生物量为最大,紫色石骨子土上的各牧草生物量为最小,各土壤类型上的牛鞭草生物量均高于其他牧草;②各牧草在泥性紫色土和黄壤上的光合速率与水分利用效率均大于在另外两种土壤上的光合速率和水分利用效率;③泥性紫色土和黄壤的含水量高于其他两种土壤;④初育土、泥性紫色土含水量均以种植牛鞭草的为最高,黄壤以三叶草为最高,紫色石骨子土则以高羊茅为最高。Pot experiment based on four types of soil （initial development soil developed from granite, yellow soil taken from sloping field, loarnic purple soil taken from mature metasequoia land and gravelic purple soil developed from purple gritstone） was conducted to study the growth of different herbs planted in them, comparing the soil moisture and investigating the effect of herbs on soil moisture. The resuits showed as follows： ①The biomass of herbs planted in initial development soil were the highest, and those planted in gravelic purple soil were the lowest. The biomass of Hernarthria compressa planted in four agrotypes were higher than others. ②The photosynthetic rate and water use efficiency of herbs planted in yellow soil and loarnic purple soil were higher than the other two. ③The moistures of loarnic purple soil and yellow soil were higher. ④The moistures of initial development soil and loarnic purple soil were the highest which planted Hemarthria compressa. The moisture of yellow soil was the highest which planted Trifolium repens, and the moisture of gravelic purple soil was the highest which planted Dactylis glomerata.

关 键 词：牧草 生物量 光合速率 水分利用效率 土壤含水量 

分 类 号：Q945.17[生物学—植物学] S152.75[农业科学—土壤学]