Abstract:

To distinguish effects of soil factors and space factors, the experiment was conducted in black soil area, and soybean plants were cultivated with a model of different rages of sash. The results showed that: yield of soybean was effectively increased by enlarging space within the scope of effective nutrient area of soybean, and yield of soybean increased significantly when the soil area of single plant was smaller. Meanwhile, as the soil area enlarged, the effect of space on increase of yield was decreased. It was implied that pods per plant, 100-seed weight were obviously increased while the useless pod rate decreased, leaf area and dry weigh pea plant were increased and plant height and pod height decreased by improving (enlarging) space factors. Therefore, for black soil area with higher fertility of soil, it is very important in soybean production to utilize and breed plant-type-compact and high-photosynthesis-efficiency soybean cultivars.

Key words: Space factor, Soil factor, Soybean