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本文于大豆鼓粒期(R_5)晴天条件下,对“两垄一沟”栽培法冠层内叶面积指数、光照强度、干物质积累的垂直分布特点进行了研究。结果表明,该栽培法整个冠层叶面积指数大。从冠层内空间分布看,叶面积指数最大值出现的植株部位高度比70cm大垄和50cm窄行平播低,中部的光照强度高。但冠层内消光系数小。说明“两垄一沟”栽培法改善了冠层中的光照条件,提高了光能的截获率,积累了更多的干物质。
In this paper, the canopy leaf area index (LAI), light intensity and vertical distribution of dry matter accumulation in the canopy of “two ridges and one furrow” cultivation were studied under the conditions of sunny soybean rotation (R_5). The results showed that the cultivation method of the whole canopy leaf area index. From the perspective of spatial distribution within the canopy, the height of the plant parts where the maximum leaf area index appears is lower than that of the 70 cm wide ridge and the narrow width of 50 cm, and the light intensity of the middle part is high. But the canopy extinction coefficient is small. The results showed that the “two ridges and one furrow” cultivation method improved the light conditions in the canopy, increased the interception rate of light energy and accumulated more dry matter.