Rice Drought and Drought Resistant Techniques
Drought-resisting and Drought-resisting Measures in Rice Fields In drought-fed rice fields, water-saving irrigation methods should be adopted.
First of all, to meet the post-transplant water, first wetting the water, then weaving irrigation, leaving no water layer in the field, and then taking shallow water irrigation after enough water; second, we must meet the booting water, because the booting period is the water in rice life Critical period, the most sensitive to drought, this period, such as the drought will cause a large number of spike abortion, thus reducing the total number of spikelets and pollen grain development is incomplete, so that after heading can not be fertilized and become empty shell, a direct impact on the yield and quality.
Pay close attention to cultivating and timely fertilizer. When drought occurs, if the fields are not completely dried up, we must step up tilling and weeding. This will not only contribute to the development of the root system, reduce evaporation, increase the drought resistance of rice, but also prevent weeds in the field from competing for water and nutrients. In addition, high temperature and drought also affect the ability of rice to absorb fertilizer, resulting in the inhibition of rice growth, it should be combined with cultivating irrigation, pay close attention to topdressing nitrogen fertilizer and compound fertilizer. If the number of seedlings is insufficient, the turning of leaves after irrigation is not obvious and the leaf color is still yellowish. The amount of fertilizer should be increased, and the grain fertilizer should be applied later. In the later irrigation plots, the recovery fertilizer should be applied first and then the pellet fertilizer should be re-used to reduce the degradation of spikelets and promote grouting.
Conditional areas can use drought-proof agents, which can reduce the evaporation rate of water by 70% to 80%. Unqualified areas can use grass or straw to spread evenly across the rows of rice, which can reduce evaporation and provide rice seedlings with certain nutrients for growth.
Strengthen pest control. The fertility of drought-bearing rice has been postponed to varying degrees, birth lags behind, and resistance is weak. Therefore, pest monitoring and control should be strengthened.
Rice Controlled Irrigation Techniques Rice Controlled Irrigation refers to the practice of returning green seedlings with a 5-25 mm thin layer in the field after rice is transplanted. After each stage of growth after returning green, the irrigation surface is no longer established in the field surface, and the root soil moisture content is taken as Control indicators, determine irrigation time and irrigation quota. The upper limit of soil moisture control is the saturated moisture content, and the lower limit depends on the different growth stages of rice. The soil saturated moisture content is taken as 60% to 70% respectively.
"Thin, shallow, wet, sun" irrigation technology
The "thin, shallow, wet and dry" irrigation of rice is based on the characteristics of water requirement and requirements of each growth period after rice is transplanted, which creates a good ecological environment for rice growth and achieves the purpose of saving water and increasing production. That is, the thin water transplanting planting, shallow water returning green, early wetting tiller, tilling the late stage of tillering, jointing and booting period of thin water recharge, heading and flowering period to maintain thin water, milk ripening period moist, wet and dry yellow maturation period. This kind of irrigation technology is concise and easy to understand and master. It is a good way to save water.
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