Four ways to control rice blight
Rice grows into the middle and late stage of reproductive growth after a good pre-growth. Strengthening the field management at this stage has a great relationship with rice yield and quality. So how do you manage the field during late rice growth?
A timely baking field
In general, it should be carried out during the time when paddy rice is not sensitive to water response, that is, it is suitable from the late tillering stage to the early stage of young panicle differentiation. The following principles should be followed during operation: Miaowang should be properly broiled early; muddy feet should be deeper, and there must be long-term phenomenon to roast more, otherwise it should be lighter; bad water should not be re-roasted; saline-alkali paddy fields should not be baked. .
Second, scientific irrigation
The heading stage is the peak of physiological water demand in rice during its life, especially in the 2-14 days before heading, it is the most sensitive to the water reaction, and water scarcity is needed so as not to affect the development of spikelet differentiation. After reclaiming the field, rehydration should be done in shallow water and groundwater irrigation should be conducted with the method of “Chen water is not dry and new water is not availableâ€. Scientific irrigation after field baking has not only saved valuable water resources, but also improved the ecological environment of the soil, maintained and improved the vitality of the roots, and facilitated the absorption and running of nutrients.
The methods of irrigation during heading and fruiting period are: heading in deep water, grouting in shallow water, moist seeding, draining and draining about 5 days before harvest. Avoid cutting off water prematurely and affecting grain weight.
Third, Qiao Shi ear fertilizer
Panicle fertilizer is generally applied after the initiation of young panicle differentiation. The amount should be determined according to the field conditions of the rice: too many stem pods, less concentrated leaves, and less time for application, urea 2.5-3 kg can be used; stem pods Insufficient numbers, yellow leaves and different shades of early application and re-applied, about 5 kilograms of urea.
Increasing grain fertilizer is mainly a deficiency of supplementary fertilizer. The best application period of granular fertilizer is the period when the rice leaves can be naturally reduced before the break, that is, it is suitable for topdressing after 2-3 days before heading. Urea is generally preferred for granules, and 2.5 kg for mu. However, it is not suitable to apply granule fertilizer in order to prevent late-maturing gluten and affect yield and quality. To prevent premature aging of plants after heading, foliar spraying should also be carried out at this time. The method is: using 1% urea, add 0.2% of potassium dihydrogen phosphate, spray each solution 50-70 kilograms per acre. Spray on sunny afternoons in the evening and spray on both sides of the blade.
IV. Pest Control
During the middle and late stages of rice growth, it is necessary to focus on prevention and control of bacterial blight, sheath blight, rice smut, and stem borer, rice borer borer, rice planthopper, etc., and these diseases and insect pests are compounded. According to this actual situation, pesticide compounding technology should be used for compound prevention and control, such as bacterial leaf blight, Sanhuaxi and other compound hazards, the control of the mixture of Ye Kuning and insecticidal double can be used to prevent and treat this problem. It also played a good control effect.
The greenhouse a filled with equipment like hydroponic, irrigation, auxiliary lighting ,temperature and humidity control and also may be automatically controlled by a computer to maximize potential growth.
Hydroponics can be used to make the most use of the interior space. The relatively closed environment of a greenhouse has its own unique management requirements, compared with outdoor production. Pests and diseases, and extremes of heat and humidity, have to be controlled, and irrigation is necessary to provide water. Most greenhouses use sprinklers or drip lines. Significant inputs of heat and light may be required, particularly with winter production of warm-weather vegetables.
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