How to manage two-line hybrid rice? Hybrid rice can be divided into "three-line" hybrid rice (including sterile line, maintainer line, restorer line) and "two-line" hybrid rice (sterile line and restorer line) according to the characteristics of sterile line. Let's take a look at the field management techniques of two-line hybrid rice. 1. The planting density needs to be reasonable: the two-line hybrid rice is generally in the order of 9-11, so it needs reasonable close planting during planting to ensure the basic seedlings. If the seedlings are too dense, the seedlings are needed. If the seedlings are too thin, the seedlings need to be replenished. The basic seedlings in the early stage are the key to ensuring the harvest in the later period (the density of the middle and upper fertile fields is 16.5*26.5cm). 2. The two-line rice needs less fertilizer than the three-line rice, but the precautions for fertilization are basically the same, that is, the base fertilizer is applied, the early topdressing is applied, and it is determined whether to apply the panicle fertilizer according to the soil fertility and field growth. Late maturity and excessive fertilization. 3, timely sowing, for a season of mid-season, planting time needs to avoid the early spring low temperature and heading poplar stage high temperature, early seeding if encountered low temperature will cause rotten buds, lack of seedlings and other phenomena, the high temperature in the heading poplar stage will affect the fruiting, resulting in Late empty granules. Before sowing, you can choose a sunny weather for a week, which is good for raising the germination rate. Pay attention to soaking seeds and germination when planting, and check the weather forecast in advance. Generally, planting is appropriate from the end of April to the middle of May. Before planting, the experimental compound fertilizer is 50kg and the urea is 10kg. 4. Transplanting in time: Two-line hybrid rice is generally transplanted for about 30-35 days. Generally, it should not be transplanted for more than 40 days. After transplanting, the herbicide is combined with early application of fertilizer (5-10kg of urea per mu) to promote tillering. And in the 25-day to 30 days after transplanting, the field is dried in time to reduce the ineffective tillering, and the shallow moisture is maintained during the tillering period. 5. Pay attention to the prevention and control of pests and diseases: The Yangtze River Basin mainly controls rice blast, sheath blight, rice smut, common dwarf disease and stripe leaf blight. Insect pests include rice leaf roller, aphids and rice planthoppers. 6, the whole field water management: shallow water transplanting, water-immersed live seedlings, water sputum, enough seedlings to rest the field, deep water heading, late dry and wet alternate. The fertility of the two-line hybrid rice sterile line is related to warm light. The sterile line is male infertility under long-term high temperature, and the male sterile line can not be self-fertile, so it is necessary to carry out hybrid production by means of the pollen of the restorer line. The total value produced by the method is that the seed is a two-line hybrid seed. Sterile lines are fertile at short-term low temperatures and can reproduce on their own. Omega-3 Fish Oil,Fish Oil 10/50 Tg,Omega 3 Fish Oil,10/50 Tg Fish Oil ZHOUSHAN SINOMEGA BIOTECH ENGINEERING CO.,LTD , https://www.sinomegabiotech.com
