Rice production has a coup

Friends of the farmers planting rice in Harbin, Heilongjiang province harvested rice after a year of hard work. A young farmer with dedication to researching technology compared his brothers to statistics on paddy yields by plot harvesting. He found that following the adjustment of rice fertilization in accordance with Liu’s guidance from Northeast Agricultural University this year, the average yield of rice acres increased by 50. kg. The family was pleased to say that this year rice has adopted the balanced fertilization method of reducing nitrogen, reducing phosphorus and applying potassium, and supplementing trace element zinc fertilizer at the seedling stage. The rice plants are robust and have neither disease nor lodging and rice yield has increased.

When the spring begins to grow rice, some old people in the Tuen Mun side do not believe in the new method of balanced fertilization, or according to the fertilization method in previous years, the method of using high nitrogen, high phosphorus, no potassium, and no trace element fertilizer is continued. These paddy rice seedlings grow fast. After suffering from two low temperatures, the disease occurs and is partially lodged in later stages. When paddy rice is harvested, the paddy field following the old fertilization method generally requires a reduction of 50 kilograms per acre. The old people in Tuen Mun together think that the reduction in the 50 kg of rice production is mainly reduced to two aspects. First, the occurrence of rice blast disease is not the same, especially the high incidence of ear stem pods after heading, and the effect on reducing yield is obvious. The second problem is lodging. There is a difference in the lodging rate of rice straw in different plots. In the field of balanced fertilization, rice straw stalks are hardly lodging, while high nitrogen and potassium-deficient fertilization fields have high lodging rates of rice straw and wait until the rice grows at a high temperature, which is conducive to grain filling and the high lodging rate of rice straw. The output of the plot will not go up. Why can balanced rice be resistant to disease and high yield?

Expert Comments: This case is based on the practice of using high-nitrogen, high-phosphorus, and no-potassium fertilizers in local rice production to adjust the proportion of nitrogen, phosphorus, and potassium, and control the amount of pure nitrogen used per acre to about 8 kg. And in Putian appropriate amount of phosphate fertilizer and zinc fertilizer into the Honda, in the Honda increase potassium fertilizer 6 kg per acre. This adjustment has balanced the ratio of nitrogen, scale and potassium. The effect of balanced fertilization is demonstrated by the rationality of the rice population and the robust growth of the plants, overcoming the damage caused by the two local low temperatures on the early rice growth. When some rice plants are infected with rice blast, the balanced fertilization of rice fields rarely occurs. Strains. In the high-nitrogen and potassium-depleted fields, when the low temperature arrives, the high nitrogen plus insufficient light, the rice growth rate is still relatively fast, the formation of slender weak seedlings, not only a large number of rice blast, but also a small part of the flax leaf spot Disease, this is a physiological disease. Scientific experiments have long shown that rice is susceptible to leaf spot disease under conditions of potassium deficiency and zinc deficiency. Rice fields with balanced fertilization are nitrogen-reduced, phosphorus-reduced, potassium-enhanced, and zinc fertilizer applied in paddy fields. Therefore, the plant growth rate is moderate, carbon and nitrogen metabolism is balanced, plants are robust, and disease resistance is strong. The reduction of diseases is the guarantee of high rice yield.

The second measure of fertilization adjustment in rice production in this case is the measure of nitrogen transfer. One-third of the total amount of nitrogen fertilizer was applied to the panicle stage, so that the nitrogen fertilizer effect exerted on the development of the panicle and grain, which could avoid the problems of premature planting and late lodging due to excessive application of nitrogen fertilizer in the early stage.

Case Tip: Balanced fertilization has overcome lodging and reduced the chances of disease occurrence. This is the main reason for the increase in rice production this year. (Cao Yiping)

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