The cause of the early rice ear
1, variety characteristics: different rice varieties, occurs at different levels of early spike, its temperature are also different.General precocious heat strong sex, the possibility of early ear is higher.Especially in high temperature, drought year, can make the rice vegetative period shorten, unusual into reproductive growth ahead of schedule, main stem earing in advance.Varieties of the earlier period, the more a reflection of light temperature, the greater the chance of early spike.
2, transplanting yields: usually a short growth period varieties, yields elastic is small, if transplanting super yields is too big, due to meet the variety of effective accumulated temperature, started young ear differentiation, easy to form early spike.The length of the rice transplanting yields has close relationship with early spike, moderate yields, seedlings rooting ability is strong, live fast, robust plant and thrive.Yields, seedlings rooting ability is weak, poor plant growth.Yields and seedling bed long period mismanagement old seedlings, rooting ability recession, live after planted tree is slow.Especially the part of early maturity varieties, yields range is strict, yields more than suitable transplanting will enter the reproductive growth, early start young ear differentiation, cause the main stem with embryo transplanting, plant began shortly after heading, form the old rail spike, the shorter the duration, the smaller yields elastic.Especially the continuous high temperature, drought, delaying transplanting plots, easy appear early spike phenomenon.
3, climate factors: during the period of rice seedlings, if encounter a continuous high temperature and drought, sunny, rice development process is accelerated, into the reproductive growth in advance, if not timely transplanting, early spike phenomenon occurs.In the process of rice growth, as long as it needs accumulated temperature will be earing, mature rice progress along with the rise of temperature of fertility, if high temperature during seedling bed, sunny, rice development process is accelerated, such as transplanting is not timely, can produce early spike.
4, ZaiCha quality: rice transplanting, should put an end to plough, rake and now planted now, to stay after mud precipitation adequately, be shallow shallow inserted, this is beneficial to the growth of tillering and earing rate increase.Plow rake to plant now now now, mud precipitation, has not yet been fully ZaiCha after sinking through the mud, will make ZaiCha depth is more and more deep, is not conducive to the production of low tillering, and produce high tillering, delay tillering, make rice heading is uneven.
5, the seedling quality: excessive seeding rate and poor management, the seedlings thin, make the nutrition growth period is not normal to shorten, lead to early spike.Phase seedling bed planting too close, seedlings growth, crowded population structure is poor, causing the seedlings grew weaker, the quality is poor, slow after transplanting seedling stage, tillering delayed, cause vegetative period shorten, also easy to cause the early spike.
6, fertilization management: long yields, the quality is poor, and water management after transplanting is undeserved, can also occur early spike.If ZaiCha is too deep, too late, nitrogen or nitrogen deficiency, poor nutrient condition, looks like the early too weak, rice growth is restrained, forcing the main stem into reproductive growth ahead of time, is also one of the reasons for the spike occurred earlier.
Rice early prevention and control technology
1, according to the variety characteristics, determine the appropriate yields: in order to ensure the quality of rice seedlings, promote the increase production of rice, according to the characteristics of rice varieties to adjust the base period, determine appropriate transplanting yields, in order to improve the yields of elasticity, prevent rice spike occurred earlier.
2, strictly control the seeding rate, foster with rice seedlings, seedlings, the yields of elasticity is relatively larger, seedling individual nutrition area is big, easy to coordinate the root, stem and leaf growth.Therefore, we should strictly control the rate, cultivating seedlings and improve seedling quality, control the occurrence of early spike.
3, improve the quality of ZaiCha, not planted over age seedling: should pay special attention to shallow planting shallow inserted when transplanting, avoid by all means is inserted, inserted against low tillering.Also caused by deep inserted oxygen poor rice growth and form early phenomenon.In as far as possible when ZaiCha not planted over age seedlings, if enough seedlings, had to plant.Heavier in seedling bed and fertilizer, field period should return to the middle fat, early tillering fertilizer.It is best to use seedlings rapidly available nitrogen ammonium bicarbonate, coordinate with rice vegetative growth, reduce the happening of the early ear.
4, strengthening the water management: on the fertilizer nitrogen, phosphorus and potassium fertilizer should be paid attention to application, increasing middle fertilizer application, early return to tillering, can quickly after taking root absorption to nitrogen literacy, promote vegetative growth and early and quick tillering.High fertility conditions, nitrogen fertilizer, reduce early spike phenomenon.Poor fertility condition, low fertilizer rate, early phenomenon aggravating.Appear early spike field, should be based on's situation, topdressing n fertilizer application in time, ensure the tillers spike's normal growth and development.Early spike may have occurred, to strengthen the field management of later period, for plots in booting stage, cannot field drying, to maintain a certain water layer, to avoid new degradation caused by the shortage of water, empty abortive.Light green to rice seedlings, and performance of yellow field, to make up ShiBao flower soil, guangzhou early and quick tillering, increase tillering earing rate.For top dressing, heading stage and filling stage, to extend the time of functional leaves are green, improve photosynthetic efficiency, improve the solid grain and increase grain, reduce production loss.Water pipe in water management should be science, early should not be to fill the deep, inhibit tillering and delay time of tillers.And later can't lack water, pollen and stigma easy dry drought, water shortage affects nectar or heading not neat, reduce the solid grains.In case of high temperature, sunshine, paddy fields should fill the deep, to improve the field moisture, reduce the spike layer temperature, to prevent the falling rate of high temperature and affect rice yield.
5, prevention and control of plant diseases and insect pests.In rice tillering stage with 40% Fuji was no. 1 100 grams, ai merlot 2 grams of spray prevention leaf of rice blast, rice planthopper.Booting stage with tricyclazole 75% wettable powder of 25 grams, validamycin 10% wettable powder 50-75 grams of spray to prevent neck rice and rice blast disease.Rice stomach issue with tricyclazole 75% wettable powder of 25 grams, validamycin 10% wettable powder 50-75 g, 250 g 18% insecticidal double water spray for branch of rice blast, rice disease and borers.