摘要
对半干旱黄土丘陵区不同立地条件下白羊草Bothriochloaischaemum人工草地的生产力与土壤水分状况进行比较研究。结果表明,人工栽培驯化利用可以显著提高白羊草草地的生产力(至少较天然草地增产20%),其人工栽培草地在川地的生产力显著高于山坡地(约为山坡地的3倍)。川地人工草地在维持高生产力的情况下,260cm以下土壤层出现雨季期间及休闲期后均不能够得到水分补偿而稳定在低湿层。
Yearly and seasonal changes in aboveground biomass and soil water of cultivated Old World bluestem (Bothriochloa ischaemum) grasslands in different habitats were compared. The results showed that Old World bluestem had great adaptability to dry-slope land as indicated by seasonal biomass cumulation. The productivity of Old World bluestem grassland was significantly improved by artificial cultivation, with a minimum increase of 20% over natural grassland. The productivity of cultivated grassland on river land was about 3 times that on sloping land. With productivity of cultivated grassland maintained at a high level on river land, soil water in the soil layer below 260 cm, which is usually maintained at 5.0% yearly, could not be renewed after rainy and fallow seasons.
出处
《草业科学》
CAS
CSCD
2004年第6期6-10,共5页
Pratacultural Science
基金
国家重点基础研究发展规划项目(G1999011708)
黄土高原土壤侵蚀与旱地农业国家重点实验室基金
中国科学院水利部水土保持研究所领域前沿项目共同资助
关键词
半干旱黄土丘陵区
白羊草
人工草地
生产力
土壤水分特征
Bothriochloa ischaemum
cultivated grassland
productivity
soil water
loess hilly-gully areas
