How to use special compound fertilizer for rice
Special compound fertilizer for rice is a kind of medium concentration compound fertilizer developed according to the demand of nitrogen, phosphorus and potassium after transplanting, which is most suitable for transplanting rice field. It has the characteristics of "low cost", "easy to use", "quick return to green" and "good safety". After use, it can enhance the ability of crops to resist lodging and diseases and insect pests, and the effect of increasing production and income is obvious.
Usage: as rice base fertilizer, the dosage is generally 25kg / mu, there is no need to apply other chemical fertilizers, you can transplant rice seedlings immediately after fertilization, and will not burn seedlings. When topdressing was applied 5-7 days after transplanting, the amount of nitrogen in topdressing remained unchanged (generally 10-15 kg / mu), and the amount of potash fertilizer could be reduced by half (indica hybrid 5 kg / mu, japonica hybrid 2.5 kg / mu). Phosphate fertilizer can be omitted. The special compound fertilizer for rice can also be used as base fertilizer in rice seedling field, topdressing in rice seedling field and transplanting field, with a dosage of 25kg / mu.
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How to prolong the rice seedling age and prepare for drought resistance and rain planting?
In normal years, the seedling age of machine transplanting is about 30 days, that of throwing seedlings is about 40 days, and that of water raising seedlings is about 50 days. If the planting water comes late, it will be faced with extending the seedling age to more than 60 days in order to wait for the seedlings to be planted in water. First, sparse sowing to cultivate long-aged and strong seedlings. That is to say, by expanding the area of seedling bed, reducing the sowing amount per square meter and prolonging the lag tillering period of seedlings, the age elasticity of early sowing seedlings can be effectively increased, the seedling quality can be improved, and the per unit yield can be improved. it can also solve the contradiction of anhydrous transplanting in the early stage.
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How to judge zinc deficiency in rice?
Zinc deficiency in rice generally occurs at the seedling stage. The symptoms are chlorosis and albinism at the base of the new leaves, small leaves, sometimes albino heart leaves, chlorosis or albino stripes in the old leaves, and brown stripes on both sides of the middle ribs. The plant is short, the leaf occipital spacing is shortened, the tiller decreases or does not tiller, the root seedling is weak, the white root is few, the floret sterility rate increases, the heading delay or even no heading, and the mature stage is delayed.
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