Rice seedlings expansion and high-yielding cultivation techniques

Reduced seedlings and high-yield cultivation techniques are supported by the high-yielding mass cultivation theory of rice, and emphasize the increase of the rate of spikes in stalks and the cultivation of high-yield and high-yield populations after heading. This technology is not only suitable for middle-production and high-yield, but also more suitable for high-yield and higher-yield production; it is not only suitable for wet seedling cultivation, but also suitable for cultivation of dry bed seedlings, seedling cultivation, seedling cultivation, direct seeding and machine seedling cultivation, and can effectively promote large areas. Sustained production and balanced production and high production.

1. Strong and strong: The key to cultivate the medium and large seedlings with the same leaves is to reduce the seeding volume of the seedlings, and the landfall must be diluted. The seeding amount should be based on the cultivation of the leafhoppers and the extension of the seedlings, based on the transplanting period. Stop the principle of childbirth to determine. Demonstration side sowing field per acre (wet seedlings), sorghum in the 6-8 leaf stage, about 20 kg of conventional rice, hybrid rice within 10 kg. If the leaf age is extended to more than 8 leaves, the seeding rate should be further reduced. Second, seedlings must be transplanted within one leaf age of the stagnation period of tillers, and seedlings in four-leaf stage should have a seeding rate of about 50 grams per plate (561 holes), which is conducive to nurturing tenderness and strength.

Second, reduction of seedlings: In view of the fact that large-scale production of basic seedlings is generally more common, highlighting the "minus seedling reduction", the number of basic stem seedlings during transplanting is controlled at 80,000 - 90,000 yuan per mu, which is 1/100 less than that for large areas. 3 or so. It is ensured that 1-2 leaves are enough seedlings (panicles) before the critical leaf age (the total number of leaves N-extension number n) is effectively delivered.

Third, expansion: At present, large-scale production of transplanting spacing 25-27 cm, spacing of 10-13 cm. The technique emphasizes the widening of the row spacing, the suitable row spacing of hybrid rice is up to 30 cm, the suitable row spacing of conventional single-season rice is more than 27 cm, the variety of large panicle can be expanded to 30 cm, and the corresponding plant spacing is reduced by about 10 cm.

IV. Fertilizer transfer: The cultivation of high-yielding rice and the optimization of population quality are the most important ones. It is not to increase the amount of nitrogen fertilizer, but to adjust the proportion of base tiller and panicle fertilizer, and the proportion of the base tiller is taken up by the habit. The amount of 80-90% is reduced to 60-50%; the panicle fertilizer is increased from 10-20% of the total to more than 40%.

5. Water control: The field should be advanced to the previous leaf age at the effective leafing stage. When the total number of shoots is about 80% of the panicle number, the field will be put down. This will effectively control invalid tillers and reduce the height of seedlings. The rate of increase of spike rate plays a significant role. In the live tree, effective tillering stage, differentiation and development stage of germ cells, and from heading to 20 days after heading, these stages are maintained from shallow water to moist irrigation, while intermittent irrigation is used in other periods to save water and promote root growth and maintain vitality.

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[Attention]
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[Storage Conditions]
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