摘要
介绍了宁南国家旱农试区近 3年试验和推广的 7种间作模式 ,结合 EL - 90 0型自动气象站的纪录 ,分析了不同间作模式的光、热资源可利用率、光能利用率和土地资源利用率。结果表明 ,7种间作模式的平均光资源利用率和热量资源利用率分别达 82 %和 85.7% ,分别比单作增加 1 8.8%和 1 8.2 % ;间作的平均光能利用率达 0 .98% ,为单作平均光能利用率的 1 .4倍 ;间作的平均土地当量系数达 1 .66。上述事实充分说明间作能有效地利用当地的光、热资源和土地资源 。
Seven intercropping patterns were experimented and popularized in recent three years in the national dryland agricultural experiment district in South Ningxia. This paper introduces these patterns and puts emphasis on analyzing resources utilization conditions of the patterns combined with the records of EL 900 automatic meteorological station. The results indicate that the mean use ratio of light resources and heat resources of these intercropping patterns is 85% and 85.7% respectively, which show an increase of 18.8% and 18.2% respectively compared with mono cropping; The solar energy utilization efficiency of these patterns is 0.634%~1.301%, the mean is 0.98%, which indicate an increase of 1.4 times against the monocropping; The mean land equivalent ratio of these inter cropping patterns is 1.66. Above facts show clearly that the intercropping can effectively utilize local light resources and heat resources and land resources, and so the intercropping is a practical path for development of high effective agriculture in semiarid areas liable to droughts.
出处
《干旱地区农业研究》
CSCD
北大核心
2000年第2期97-103,共7页
Agricultural Research in the Arid Areas
基金
"九五"国家旱农攻关项目!"96- 0 0 4 - 0 4 - 0 7"
关键词
间作
光资源
热量资源
利用率
宁夏半干旱偏旱区
intercropping
light resources
heat resources
use ratio
solar energy utilization efficiency
land equivalent ratio
South Ningxia
