Rice heading and grain-filling period is the production of grain-filling seed, which is the two processes of heading and flowering and grain filling. It is the key period to determine grain weight and grain weight. Foliar fertilization, intermittent irrigation, control of rice aphids, and maintenance of live stalk maturity are not Lodging is the management focus.
The specific measures are as follows:
1. Wet irrigation: heading and flowering period is a period sensitive to water, and can not be short of water; filling period is a period when rice needs more water, but it can not long-term irrigation of deep water and accelerate the aging of the leaves and roots, should the heading flowering period to take shallow water Irrigation, after the use of dry and wet, wet-based irrigation methods to achieve field coordination of water and gas, maintain the vitality of roots and leaves, improve seed setting rate, increase grain weight. Water is cut off for 7 days before harvest.
2. Spraying foliar fertilizer: The purpose of spraying foliar fertilizer is to enhance seed quality and increase maturity and plumpness. From the perspective of improving quality, it is not appropriate to disperse long-acting nitrogenous fertilizers such as urea, but it is advisable to spray foliar surfaces after the panicles for yellowing of the leaf color. Generally, spraying potassium dihydrogen phosphate 2 to each ha 2.5 kg and urea 4 to 5 kg, 400 kg of water spray, with good flowering spray effect. Or use bio-potash, Jinmanli, Huimanfeng, and plant growth regulators, etc., so that it is not only effective for increasing seed production; it is also very important for extending root vigor, keeping live stalks mature, preventing lodging, and improving quality. The role.
3. Prompt control of pests and diseases: rice leaf spot, rapae blight, rice blast, early prevention. Apply twice-effect micro-fertilizer 800 times evenly sprayed, and re-spray within 6 hours after spraying. The above diseases have better preventive effects, and can increase rice production by about 15%. In this period, it is necessary to timely defend the rice borers in the headland of Tanabe to ensure that functional leaves are not damaged, so as to achieve the purpose of increasing production, increasing income, and improving quality.
4. Eliminate weeds: Prevent and control floating weeds such as arbutus, moss and weeds, remove weeds from large grasses and ponds, channels, and land in order to prevent light from affecting the increase in water temperature and reduce grass shortages in the following year. , reduce the source of pests and diseases.
5. Anti-lodging: The main causes of lodging in production are: improper fertilization, excessive nitrogen fertilizer application, excessive bulk fertilizers in the early stage, excessive hunger in the early stage, premature aging due to defermented hunger, wilted stems and leaves, improper irrigation, and diseases and insect pests. The impact of wind and rain caused the lodging. The roots of lodging should be changed from unscientific fertilization to good selection of varieties, sparse sowing, shallow water ground irrigation, timely drying, etc. to improve the cultivation and management level.
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