Rice drought resistance fertilization technology
General principles: Use organic fertilizers and chemical fertilizers together , increase phosphorus and potash fertilizers, and spray foliar fertilizers at appropriate times. Recommend deep application of base fertilizer and comprehensive management techniques combined with other drought-resistant technologies.
seedlings in drought Good seedlings and strong seedlings are the key measures for drought resistance and good harvest. In areas where water is available, dry seedlings should be promoted; where there is no water available, commercial seedlings should be raised off-site.
2. Drought-resistant varieties
select varieties with strong drought resistance, better disease resistance and seed treatment. The growth period is suitable, try to avoid the influence of high temperature and drought on rice blooming and fruiting.
3. Properly extend the seedling age
make preparations for rain-planting seedlings such as drought resistance. Under normal conditions, the seedling age of dry seedlings is about 30 days. If the water for planting seedlings comes late, you need to extend the age of the seedlings so that you can wait for the water to plant the seedlings.
4. Soil preparation for drought resistance
Soil water storage is the fundamental measure for drought resistance. The use of micro-tillers for plowing or digging dry slab fields can not only cut off the soil capillary, reduce the evaporation of deep soil moisture along the capillary, and prevent the aggravation of drought; but also block the cracks and prevent the deep leakage of precipitation from the cracks. Dry rotary tillage and dry harrowing of the field, use precipitation at any time or take measures such as blocking water, diverting water, pumping water, and blocking leakage at the foot of the field to store water, resist drought and protect planting.
5. Drought-resistant planting seedlings
make full use of all available water sources, from rivers, ponds, reservoirs, weirs, water pumping, diversion, field preparation, as long as the rice field soil is fully saturated with water, seedlings can be planted.
increase the application of organic fertilizers , including farmyard manure, green manure, and straw returning to the field. Deep application of organic fertilizer has a long-lasting fertilizer effect. It has an obvious effect of improving soil and fertilizing . It can comprehensively adjust the soil water, fertilizer, gas, and heat status, while increasing soil aggregate structure, increasing field water holding capacity, and improving water use efficiency and chemical fertilizer. Fertilizer effect.
Increased application of phosphorus and potassium fertilizers: Phosphate fertilizers promote early and rapid rooting, and improve drought resistance. Phosphate fertilizer (recommended amount 6-7 kg/mu, calculated as P2O5) is applied as a one-time base fertilizer. Increased application of potassium fertilizer (recommended dosage of 7-8 kg/mu, calculated as K2O; 4-5 kg/mu under the condition of returning straw to the field) promotes the development of root system, thick stalks, improves drought resistance and quality of rice. Nitrogen fertilizer is based on the principle of applying sufficient base fertilizer (recommended dosage is 10-11 kg/mu, calculated as N). If conditions permit, a slow and controlled release rice compound fertilizer can be used.
Foliar fertilizer: During the heading and flowering stage, use 150-200 grams of potassium dihydrogen phosphate per mu and 50 kilograms of water to spray to enhance the resistance of rice plants and increase the seed setting rate and thousand-grain weight. In order to combine with drought resistance, you can reduce the concentration of nutrient solution, reduce the amount of spray, and increase the number of top dressing.
Deep application of base fertilizer: Deep application can reduce fertilizer loss and improve fertilizer efficiency, especially in dry years.
7. Pest control
strengthen the control of plant diseases and insect pests. In particular, the pesticide control of rice leaf roller, rice planthopper, bacterial blight and sheath blight is used to prevent drought.
8. Harvest Harvest at the
right time, harvest carefully. The maturity of the grains in arid fields varies greatly, and harvesting should be doneat an appropriate time according to the maturity of most rice in the field .