Cucumber scientific fertilization guidance

1. Problems with fertilization and principles of fertilization

The planting season of cucumber is divided into autumn and winter sorghum, wintering sorghum and winter sorghum. The blind fertilization in the production is unreasonable. The excessive fertilization leads to serious nutrient loss. The organic fertilizer applied in the vegetable field is mostly livestock. The following fertilization principles are proposed: the main fertilization principle is caused by the decrease of soil biological activity, the continuous deterioration of soil quality, the decrease of nutrient absorption efficiency and the decline of vegetable quality.

(1) Adding organic fertilizer, advocating the application of high-quality organic compost, paying attention to the application of compost with more straw, less application of poultry manure, implementation of organic and inorganic fertilizer and straw returning;

(2) According to the soil fertility conditions and the application amount of organic fertilizer, comprehensively consider the supply of environmental nutrients, and appropriately adjust the dosage of nitrogen, phosphorus and potassium fertilizers;

(3) Adopt reasonable irrigation techniques and follow a small number of irrigation fertilization principles;

(4) After planting, the seedling stage should not be frequently topdressed, nitrogen fertilizer and potassium fertilizer should be applied in stages, a small number of times, avoiding the application of compound fertilizer with high phosphorus content, paying attention to top and late topdressing;

(5) When the vegetable acidification is serious, an acidic soil conditioner such as lime should be applied in an appropriate amount.

2. Fertilization amount and method

(1) Increasing seedling fertilizer, applying decomposed organic fertilizer, replenishing phosphate fertilizer, applying 60-100 kg of decomposed organic fertilizer per 10 m2 seedbed, 0.5-1 kg of calcium magnesium phosphate fertilizer, 0.5 kg of potassium sulfate, and spraying 0.05%-0.1% according to the seedling condition. Urea solution 1 or 2 times.

(2) The base fertilizer is applied with high quality organic fertilizer 3~4 square meters/mu.

(3) The production level is 14000-16000 kg/mu: nitrogen fertilizer (N) 45-50 kg/mu, phosphate fertilizer (P2O5) 20-25 kg/mu, potassium fertilizer (K2O) 40-45 kg/mu.

(4) The production level is 11,000-14000 kg/mu: nitrogen fertilizer (N) 37-45 kg/mu, phosphate fertilizer (P2O5) 17-20 kg/mu, and potassium fertilizer (K2O) 35-40 kg/mu.

(5) Production level 7000 ~ 11000 kg / mu: nitrogen fertilizer (N) 30 ~ 37 kg / mu, phosphate fertilizer (P2O5) 12 ~ 16 kg / mu, potash fertilizer (K2O) 30 ~ 35 kg / mu.

(6) The production level is 4000-7000 kg/mu: nitrogen fertilizer (N) 20-28 kg/mu, phosphate fertilizer (P2O5) 8-11 kg/mu, and potassium fertilizer (K2O) 25-30 kg/mu.

If drip fertigation is used, 20% of fertilizer can be reduced. If flooding is used, it is necessary to increase the amount of fertilizer by 10% to 20% per fertilization. All organic fertilizers and phosphate fertilizers are applied as base fertilizers in the facility. The initial flowering period is mainly controlled. All nitrogen and potassium fertilizers are regularly applied according to the nutrient requirements of the growth period by 6 to 11 times; the amount of nitrogen fertilizer applied per time does not exceed 5 kg/mu; The nitrogen and potassium fertilizers of autumn and winter glutinous rice and winter spring glutinous rice are divided into 6 to 7 times of topdressing, and the nitrogen and potassium fertilizers of wintering long carp are divided into 10 to 11 times of topdressing.