I. Performance of Rice Ears
Early ear of rice refers to the phenomenon that the main ear of rice grows in the field during the field period, and the young ear has already begun to differentiate or form, and the ear is heading prematurely after transplanting. Rice fields where early spikes occur, as early as 10 days after transplanting, and less than one month late, start heading, the plants become short, and the heights are not uniform, and the flag leaves are particularly long, forming pheasant tails. The shape of the leaves of the plants is greatly changed. There are pods in the same pod, some headings, some booting spikes, and some pods are growing. Generally, slight earings generally reduce the yield by 5 to 10%, and special earings generally reduce the yield by more than 50%.
Second, the cause of rice early ear
First, the planting is too large and the planting is too dense. Second, the planting season is too long. At present, the rice varieties planted in our county are suitable for transplanting for about 30 days and the conventional hand-carrying plant for about 45 days. Due to the severe drought in recent years, the water Transplanting pods, some local crickets have reached 50 days or more, and severely more than 60 days, causing fecal transplants. Rice has already started young panicle differentiation in the paddy field, and the panicle transplanting began shortly after transplanting. Third, climatic factors have affected rice planting this year. High temperature and drought, with sufficient sunshine, lead to accelerated growth of rice varieties, advance into reproductive growth, and thus the phenomenon of early earing; Fourth, environmental conditions and improper cultivation and management will also cause early earing phenomenon. For varieties with long growing period, sows with relatively dilute seeding, medium ageing, high fertility conditions, and more nitrogen fertilizer application, the phenomenon of early earing was relatively rare.
Three, early spike remedies
For paddy fields where early spikes have already occurred, management at the booting stage, heading stage and later stage must be strengthened to minimize the loss of yield. For plots whose earings are about to heading, they should not dry their fields, but must intensify their time to rehydrate, maintain a certain water layer, and avoid empty grains after the spikelet differentiation due to water shortage; timely application of panicle fertilizer to promote early birth of the tiller panicles In order to maximize the recovery of production loss due to early ear, 5-8 pounds of urea per mu was harvested; during the period of heading, about 5% of the panicles were extracted per acre. Can use 0.2 kg of potassium dihydrogen phosphate water 30-40 kg foliar spray, promote full ear, 5-7 days after the application, extend the photosynthesis function of functional leaves, increase the seed setting rate, to increase production and reduce losses the goal of.
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