摘要
研究结果表明 :苇状羊茅、百喜草、葛藤、百脉根等 4种草被植物可有效增加植被覆盖度 ,减少土壤容重 ,增加土壤孔隙度 ,提高土壤贮水量。茎叶吸水率达到自身重量的 39.5 %～ 4 8.3% ,0～ 2 0 cm土层内直径小于 1m m的须根数量分别占总根量的 79%、82 %、76 %和 85 % ,鲜草产量分别达 6 0 t/ hm2 、4 2 .5 t/ hm2 、4 5 t/ hm2 、2 3.1t/ hm2 ;保持水土作用强 。
Grasses(tall fescue,Bahia grass,crowfoot,pueraria)could decrease soil bulk density,increase the porosity of soil,and enhance the water holding capacity of soil.The water absorption of stem and leaves amounted to 39.5%~48.3% of its own weight.In soil layer 0~20 cm,the amount of small roots that diameter was less than 1 mm was 76~85 percent of total roots,The output of fresh grass were 60t/hm 2,42.5 t/hm 2,45 t/hm 2,23.1 t/hm 2.It has considerable benefits of soil and water conservation and ecology.They are excellent feeding grass species for soil and water conservation.
出处
《水土保持研究》
CSCD
2002年第4期136-138,共3页
Research of Soil and Water Conservation
基金
国家重点科技攻关计划西部专项 (编号 :2 0 0 0 -k0 1-0 4-0 6)
贵州省基金 (编号 :黔基合计字 2 0 0 1-3 0 41)
农业厅资助项目 (黔农科字 1999-0 7)研究内容之一
