High-yield fertilization techniques for hybrid late rice

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Hybrid late rice has the advantages of large panicles and many grains and strong tillering ability. The yield is 20% to 30% higher than that of conventional varieties. It depends on tillering to produce high-yield and has a large demand for fertilizer. Due to the high temperature at the early stage of production, fertilizers are easily decomposed and utilized, the temperature at the later stage is gradually reduced, the fertilizer is decomposed slowly, the soil fertility is weakened, and premature aging of defertilizers is prone to affect the development of grains and spikes. Therefore, to obtain high yield of hybrid late rice, it should be applied to fertilization. Pay attention to skills and avoid weaknesses to give full play to the potential for increased yield of hybrid late rice.

Increase potassium fertilizer. Applying potash fertilizer to hybrid late rice can increase the absorption and absorption capacity of roots and the tillering ability of tillering nodes, improve the lodging resistance and disease resistance of the stems, accelerate the transport and transformation of nutrients in rice plants, and make the tillering rate of tillers obvious. Increased grain number per spike and 1000-grain weight increased. According to experiments conducted by the agricultural technology department: In the process of growth and development of hybrid late rice, if 35 kg of ammonium sulfate is applied per acre, 22 kg of superphosphate and 22 kg of potassium chloride are required to meet the nutrients of nitrogen, phosphorus and potassium. Needs.

Apply fertilizer early. Early cultivator and early top-dressing, generally 5 to 7 days after the insertion, ie topdressing, to promote early delivery, this top dressing generally accounts for 20% to 25% of the amount of fertilizer. This time the tillering fertilizer should be dominated by nitrogen fertilizer, with the combination of phosphorus and potash fertilizers, and the use of base fertilizers should be insufficient. After grabbing the planting and combining the arable land and the paddy field, the mud and fertilizer are integrated. Generally, 7-10 kilograms of urea or 25 kilograms of carbon ammonium per acre is used as a tiller fertilizer. To use ammonium bicarbonate as a tiller, it is necessary to adhere to the method of applying fine soil in the evening and topdress the field with 3-5 cm of water to prevent burning of the seedlings. After 7-10 days, depending on the growth of seedlings, fertilizers can be applied to the seedlings that are growing poorly. Hybrid rice is more sensitive to moisture. After returning green, it can be properly sowed to promote roots. Afterwards, shallow water is used for groundwater irrigation. Water can be used to regulate fertility, and high temperature can be used to properly regulate temperature in deep water and promote the occurrence of multiple crops.

See Miao Qiao Shi ear fertilizer. The panicle farmer is called Zhuangfeifei. Rice panicle fertilizer can be divided into flower-promoting fertilizer and flower-preserving fertilizer according to different application periods. In late hybrid paddy fields with insufficient field fertilizer, less applied tiller, poor growth, and insufficient number of seedlings, flowering fertilizer can be applied at the beginning of young panicle differentiation (ie, when the penultimate third leaves are barely exposed), and can promote branches and spikelets. The differentiation increased the number of spikelets and spikelets per panicle.

Make a good break. The breakage fertilizer (also known as grain fertilizer) of hybrid late rice should be applied at the heading stage or heading stage, mainly to increase the late vigor of hybrid late rice, prevent premature aging, increase grain weight, and if the leaf color fades at the heading stage, Mu should be applied 2-3 kg of urea, 2 kg of potassium chloride, or foliar spray of 1% urea solution and 0.2% potassium dihydrogen phosphate solution 2 times, 7-8 days apart, spray fertilizer solution 60 About kilograms. After the late hybrid rice has full panicle color, the 0.2%-0.25% potassium dihydrogen phosphate solution should be sprayed on the leaves for 2-3 times, which can promote the transfer and transformation of nutrients into grains, and prevent late-maturing lust.

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