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为夺取夏播大豆的高产稳产,现将我们试验取得的适宜密度及其栽培技术简述如下:一、适宜密度。据试验,在冀南地区的气候条件,中等肥力的土地上,夏大豆的适宜种植密度是:冀豆一号每亩2.5万左右,冀豆三号每亩1.5—2.5万,邯选79154每亩1.5—2万。这样,叶面积系数大于2的持续时间最长,总光合势最大,最大叶面积高峰出现在开花末期,因而光能利用率高,制造的光合产物多,产量较高。总之,肥地宜稀、薄地宜密。
To seize summer sowing of high and stable yield, now we test the appropriate density obtained and its cultivation techniques are summarized as follows: First, the appropriate density. According to the test, the suitable planting densities of summer soybean in the climate conditions and medium fertility in southern Hebei are as follows: Jidou No. 1 is about 25,000 per mu, Jidou No. 3 is 15,000 to 25,000 per acre, Handan 79154 Mu 15-2 million. In this way, the longest duration of the leaf area coefficient greater than 2, the highest total photosynthetic potential, the peak of the maximum leaf area appears in the late flowering stage, and thus the utilization of light energy is high, producing more photosynthetic products and higher yield. In short, fat should be thin, thin to be dense.