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Second, the seedling stage to protect the seedling period of summer soybean (about half a month after emergence) evaporation, we must do a good job security work. Summer soil moisture content of soybean seedlings less, can promote the root under the bar, seedlings to prevent late lodging. Unless it is too dry or weak, it is generally not necessary to water.
In the branching stage, the growth of roots of soybean was fast during the period of irrigation, and the growth of vegetative shoots increased gradually. When the soil water capacity in the field falls below 70%, small water should be filled.
Fourth, during the flowering period, timely irrigation of soybean flowering and podging stage (from flowering to bulging period of about 25 days) vegetative growth, reproductive growth, rapid growth rate is the peak period of water demand. When the soil moisture falls below 80% of the field capacity, it must be promptly irrigated.
5. The vegetative growth of the irrigated soybean grain in the drum grain and mature period was stopped and the reproductive growth was vigorous. In order to ensure the vigorous development of photosynthesis, when the soil moisture is reduced to 80% of the field capacity (pre-granule period) and 70% (post-granule period), it must be timely irrigation to increase grain weight. The temperature in the later period of the drum grain decreases and the water consumption decreases. The soil moisture content should be gradually reduced, but the field water capacity should not be lower than 65%.
Sixth, cautiously pouring Mengtou water before sowing after sowing soybeans, whether it is poured into the water, should be cautious. Because the soil compaction after pouring will lead to increased resistance to the emergence of cotyledons, affecting emergence. In areas with irrigation conditions, the soil drought before summer soybean planting should be a method of pouring water at the bottom when catching a farmer. Do not sow the head water after sowing to solve the drought problem.
Summer Soybean Irrigation
First, the pods sowing summer soybean sprouting period is a positive dry season, poor soil moisture. It is recommended to irrigate and forge first, then sow or sow in the rain, in order to achieve sufficient planting, broadcast all seedlings, lay the foundation for high yields. Irrigation can be done before or after wheat harvest. It is best to use irrigation (for narrow rows of plots) or furrow irrigation (for row spacings above 40 cm). Do not flood with water. After irrigating, it should be kept in a timely manner and immediately sowed. Before wheat is harvested, the land to be irrigated must be immediately taken care of and harvested.