The main method to improve fertilizer efficiency

1. Organic fertilizer piled up and cooked as base fertilizer

In late July, press 4000 kilograms of human feces at Xiangyang, add 100 kg of calcium, magnesium, phosphorus, and 400 kg of crushed wheat straw. After mixing, piling up into a cocoon shape, cover it with shabby plastic film or use a straw to cover the soil. Days, high-quality organic fertilizer is used as a base fertilizer in greenhouses.

2, superphosphate concentrated as base fertilizer

In the transplanting line open 8 cm deep ditch, after the removal of phosphate fertilizer cover 4-5 cm, and then transplant the crop in shallow ditch, shorten the phosphorus fertilizer and crop root distance to make up for the weakness of phosphorus mobility.

3, urea early application, deep application and external application

According to the demand of fertilizer and water in the development stage of crops, early application and deep application will increase the utilization rate by 28% compared with shallow application. Shed temperature is 7 days in advance at 15-20°C, shelf temperature is 5 days ahead at 20-25°C, 8-10 cm ditch is opened at the time of topdressing, and soil is tightly covered after withdrawal. Holes can be used for crops with large row spacing. Deeply. According to greenhouse temperature watering every 5-7 days, it has enough time in the soil to fully ammonia, in order to facilitate the absorption and utilization of crops. During the growing period of the crop, the foliar may be sprayed with 0.3% urea solution once every 7 days, with 100 kg per acre solution for 2-3 consecutive times.

4, ammonium bicarbonate deep application

Ammonium bicarbonate is an ideal quick-acting fertilizer for winter greenhouse vegetable production. Because it seldom volatilizes at a ground temperature of 20°C, it can dissociate into ammonium ions and be absorbed by the soil after it is applied to the soil, and then slowly released for the root absorption of the crop, even at 5 Under the soil temperature condition of °C, it can also be transformed and absorbed by crops. When composting, it should be 10 to 10 cm deep from the roots of the crop, and the ditch should be covered with soil after spreading. The utilization rate can be increased by 10 to 30%, and the yield can be increased by 10% compared to the shallow application, and the yield can be increased by 7.8% compared with the water application.