Cultivation techniques of Green Rice

First, select improved varieties and highlight excellent characters. Highlight the characteristics of high-quality varieties, select good stress resistance, strong tillering ability, large spike, suitable for dry breeding in greenhouse, super-sparse planting mode of middle and late-maturing varieties, seed quality above grade II, germination rate more than 95%, purity more than 98%. Germination test was carried out before sowing, and seeds that could not reach the standard could not be made.

Second, catch early before snatching and compete for accumulated temperature. Everything should highlight an early word, mainly early raising seedlings and early transplanting rice seedlings. Raise seedlings early in the greenhouse. The first and second accumulated temperate zones were sown and raised seedlings at the beginning of April, and the third and fourth accumulated temperate zones began to raise seedlings on April 10-15. Sterile May seedlings, do everything possible to cultivate strong seedlings and improve the quality of seedlings. Transplanting rice seedlings should also highlight an early word, which should be planted in the high yield period without transplanting seedlings in June. Transplanting seedlings should raise the standard, raise the soil temperature and water temperature, increase the effective tillering rate, and promote the good development of rice root system.

Third, rational fertilization to promote development. To achieve the combination of agricultural fertilizer and biological fertilizer, the combination of nitrogen, phosphorus and potassium, the combination of bottom fertilizer and topdressing, it is best to apply chicken manure, but chicken manure should be rotten and fermented, and 1000 kg per mu should be applied evenly. Grade A green food rice can apply limited chemical fertilizer, but AA grade rice can only apply organic fertilizer and biological fertilizer instead of chemical fertilizer. The principle of topdressing is to eat less and more meals, that is, to return to green fertilizer, tiller fertilizer, panicle fertilizer and grain fertilizer. The purpose of panicle fertilizer application is to increase the number of spikelets, prevent degradation and increase seed setting rate. The purpose of grain fertilizer application is to improve photosynthesis, prevent rice plant aging and increase 1000-grain weight.

Fourth, clean water irrigation, scientific use of water. Green food rice must be irrigated with clean water, and must not be irrigated with domestic sewage or industrial water. The general principle in water layer management is to give priority to shallow water, to increase temperature by water, to promote control by water, to support roots by gas, and to protect leaves by roots, so as to achieve the maturity of living stalks. Specific irrigation methods: flowering up to water during transplanting period, 3cm water layer after turning green, shallow water irrigation before the end of effective tillering, intermittent irrigation, improving effective tillering, growing luxuriant plots at the end of effective tillering, immediately draining and drying the field for 7 days, controlling invalid tillers, and then adopting moist irrigation, raising roots and protecting leaves, and living stalks to mature. Drain and dry the field once before heading to ensure that the heading is concentrated and heading ahead of time. In case of obstacle chilling injury, deep water irrigation should be adopted for 15 days before heading, keeping the water layer 15cm, making the water temperature higher than the air temperature, protecting the ear differentiation from the harm of low temperature, and passing through the low temperature period safely, which is an effective measure to prevent the obstructive chilling injury.