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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 ,是发展半干旱偏旱区高效农业的有效途径之一
This paper introduced 7 kinds of intercropping modes tested and popularized in recent 3 years in arid and agricultural regions in South Ningxia. Combining with the record of EL - 90 0 automatic weather station, the utilization rate of light and heat resources and the utilization of light energy of different intercropping modes were analyzed Rate and land resource utilization. The results showed that the average utilization rate of light resources and heat resources in seven intercropping modes were 82% and 85.7% respectively, an increase of 1 8.8% and 1 8.2% respectively compared with that of single cropping and the average utilization of light energy of intercropping was 0.98 %, Which is 1.4 times of the average utilization of light energy. The average land equivalent coefficient of intercropping is 1.66. The above facts fully demonstrate that intercrops can effectively utilize local light, heat resources and land resources and are one of the effective ways to develop high-efficiency agriculture in semi-arid and semi-arid areas