Hybrid Rice Honda Fertilization Technology

Hybrid rice has a physiological advantage of hybridization, showing that the root system is developed, and the growth potential is strong in the early and middle stages. Under the condition of insufficient fertilization, the fertilizer absorption level exceeded the fertilization level, indicating that hybrid rice has a strong potential for utilizing nutrients in rice fields.

In addition to the large demand for potassium, the nutrient required for unit rice production in hybrid rice is not much different from that of conventional rice. According to the measurement, for every 100 kg of rice produced (grain-grass ratio is 1:1), it needs to absorb N 1.5-1.9. Kg, P2O5 0.8 ~ 1.0kg, K20 1.8 ~ 3.8kg, the ratio of the three is about 2:1:3.

At different growth stages, the quantity and proportion of nutrients absorbed by hybrid rice are not the same, and the absorption of nitrogen is the highest from the time of returning to the peak of tillering, which accounts for about 50% to 60% of the total amount of the whole growing period. In the second place, accounting for about 30% to 40%, still account for 10% to 20% in the mature stage, which is higher than that of conventional rice, indicating that the hybrid rice still needs to absorb a considerable amount of nitrogen in the later stage; It accounts for about 50% of the total absorption, and it absorbs 15%~20% in the mature stage; the absorption of potassium is still the most in the tillering period and the spikelet differentiation period, accounting for more than 90% of the whole growth period, with little absorption after heading. . However, due to the fact that hybrid rice has a small density and a small number of seedlings, a higher fertilizer supply intensity is required in the early stage to exert the advantage of single plant absorption.

As with conventional rice, both hybrid rice and single-season rice have two peaks of uptake of fertilizer, both in indica rice and japonica rice. Hybrid early rice is less obvious.

Hybrid rice generally adopts early-onset, middle-steady, and post-fertilization methods, ie, the application of base fertilizer and tiller fertilizer. The base fertilizer is mostly organic fertilizer and chemical fertilizer combined application. On the one hand, chemical fertilization can rapidly increase the soil fertility after transplanting. On the other hand, organic fertilizer can achieve continuous supply of nutrients, so as to increase the tillering potential in the case of a relatively thin planting density, and soon reach the number of tillers; the application of panicle fertilizer is to use light fertilizer to hang ear and use a small amount. Compound fertilizer is used as a preserved fertilizer, so that the middle-leaf color is relatively stable.

The amount and proportion of base fertilizer should be based on soil fertility, soil type, species characteristics and fertilization levels. The amount and proportion of base fertilizer with low soil fertility can be appropriately increased, and the soil with high fertility can be appropriately reduced; the soil with thick clay soil can maintain strong fertility, and the amount and proportion can be appropriately increased, while the soil with shallow sand has poor fertility, and the amount of The proportion should be appropriately reduced; the amount and proportion of high fertilization levels should be appropriately increased, and vice versa. The basic fertilizer of mid-season hybrid rice accounts for about 70% of the total fertilizing amount, and late-planting fields can adopt a bottom-recovery fertigation method.

Rice has little absorption of trace elements such as manganese, zinc, boron, copper, etc., but these trace elements are very important for their physiological metabolism. Once they are lacking, they will seriously affect their growth and development, such as some deep-rooted and cold-waterlogged fields. This is because of zinc deficiency. Therefore, attention should be paid to the application of micronutrients in the depleted fields.

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PRODUCT  NAME  

CAS NUMBER

SPEVIFICATION

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