Application of fertilizer for rice field management techniques

Fertilization is one of the most effective ways to increase the yield per unit of rice. Fertilization in paddy fields is mainly based on urea, diammonium phosphate, potassium sulfate (potassium chloride) and bio-silicon fertilizer. Micro-fertilizer, biological fertilizer and regulator are used according to the guidance of the agricultural technology department.

When the fertilizer to be applied early, this time because the nitrogen fertilizer over a period of time to play a role, because the nitrogen fertilizer play slower, tillers should be applied as soon as possible, usually administered immediately after turning green; depends on the growth of the seedlings when fertilizer, tillering 80% of the whole field to be administered, depends on the remaining 20% ​​of the seedlings growing administered appropriately adjusted, seedling and good slightly reduced, the potential difference of some seedlings to pay more, so the purpose of the administration is to control the whole Tianmiao together to achieve consistent the growing; it also depends upon fertilization weather, rain or morning dew is generally greater when not fertilize, water stick avoid melting of fat burning phenomenon seedling leaves; after fertilization to keep the water level of the field, do not drain, to be naturally fall dry and then carry out irrigation.

Fertilization period can be divided into basal, tillering, panicle, Postheading (depending on the choice of rice growth potential) four times. The fertilization time and distribution ratio in each period are as follows.

base fertilizer

The rice is applied to the soil before transplanting, and the base fertilizer accounts for 40% of the total amount of chemical fertilizer, combined with the last application of the field. It is recommended to apply 20 kg of Saco-rich rice fertilizer 20-12-14 or similar compound fertilizer per 667 square meters (one mu).

Split fat

The tillering period is an important period of increasing the number of strains, and is applied half a month after transplanting or transplanting. Key tillering is nitrogen, the whole growth period, this stage can be administered about 1/3 tillering, 3 to 5 kg urea mu, may increase or decrease as appropriate according to the fertility of the soil, good slightly reduced fertility, low fertility Appropriate increase, strong seedlings can be inserted early, and weak seedlings can be inserted later. According to the growth of the seedlings, some micro-fertilizers should be added as appropriate.

Spike fertilizer

Divided into flower fertilizer and flower fertilizer. The flower-promoting fertilizer is applied during the coke differentiation stage to the floret differentiation stage. In this period, nitrogen application can increase the number of spikelets per panicle. The flower-preserving fertilizer is applied slightly before the meiotic phase of pollen cells, which has the effect of preventing the degradation of spikelets and increasing the accumulation of stem and sheath storage. Spike fertilizer does not distinguish between flower fertilizer and flower fertilizer, but is applied 40 to 50 days after transplanting. It is recommended to apply 10 kg of compound fertilizer or similar compound fertilizer of 10 to 6 to 24 per 667 square meters (one hectare).

Granular fertilizer

Granular fertilizer has the functions of prolonging leaf function, increasing photosynthesis intensity, increasing grain weight, and reducing empty granules. Especially for rice fields with small populations and varieties with large panicle size and long filling period, it is recommended to apply a small amount of urea, but not to be partial to nitrogen, so as to avoid late maturity.

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