The characteristics of such rice fields are excessive water content, too little air, cold soil, and affecting soil microbial activity. Therefore, the effective nutrient content is extremely low, and due to the fact that they are often under reducing conditions, rice roots produce poor growth, resulting in very slow growth in the early stages. less. In the later period, with the increase of temperature, the mineralization of organic matter is rapid, and it is easy to promote the excessive absorption of nutrients by rice, so that the plants grow vigorously, induce rice blast, and delay the emergence of the ear. Therefore, the principles to be mastered in the application of fertigation in the cool soaking fields are:
1. Early application of green manure, proper control of late fertilization, to prevent late maturity and low maturity.
2. Phosphorus supplementation and zinc supplementation, the absorption of phosphorus by rice under cool conditions is impeded, therefore it is necessary to increase the application amount of phosphate fertilizer, and supplement zinc fertilizer at the same time.
3. Withdraw from the water, increase soil temperature, and promote the release and absorption of nitrogen and phosphorus.
4. In cold-sweeping fields, heat-grown organic fertilizer should be applied to improve soil and improve soil fertility.
1. Early application of green manure, proper control of late fertilization, to prevent late maturity and low maturity.
2. Phosphorus supplementation and zinc supplementation, the absorption of phosphorus by rice under cool conditions is impeded, therefore it is necessary to increase the application amount of phosphate fertilizer, and supplement zinc fertilizer at the same time.
3. Withdraw from the water, increase soil temperature, and promote the release and absorption of nitrogen and phosphorus.
4. In cold-sweeping fields, heat-grown organic fertilizer should be applied to improve soil and improve soil fertility.
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