Fertilization principle
(1) Advocate the application of high-quality organic compost, pay attention to the application of more compost with more straw, less application of poultry manure, implementation of organic and inorganic fertilizer application 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, high-nitrogen compound fertilizer in the early stage, and paying attention to potash fertilizer in the middle and late period.
(5) When the vegetable acidification is serious, an acidic soil conditioner such as lime should be applied in an appropriate amount.
(6) Advocate the application of water and fertilizer integration technology to achieve water control and fertilizer control, improve quality and increase production costs.
2. Fertilization advice
(1) Increasing seedling fertilizer, applying decomposed organic fertilizer, supplementing 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% according to the seedling condition- 0.1% urea solution 1-2 times.
(2) 4-5 square meters/mu of high-quality organic fertilizer applied to base fertilizer.
(3) The production level is 3000-6000 kg/mu: nitrogen fertilizer (N) 12-20 kg/mu, phosphate fertilizer (P2O5) 5-9 kg/mu, potash fertilizer (K2O) 15-24 kg/mu. The production level is 6000-9000 kg/mu: nitrogen fertilizer (N) 20-28 kg/mu, phosphate fertilizer (P2O5) 9-15 kg/mu, potash fertilizer (K2O) 24-36 kg/mu; production level 9000-12000 kg/mu : Nitrogen fertilizer (N) 28-36 kg / mu, phosphate fertilizer (P2O5) 15-18 kg / mu, potash fertilizer (K2O) 36-48 kg / mu; production level 12000-15000 kg / mu: nitrogen fertilizer (N) 36-45 Kg/mu, phosphate fertilizer (P2O5) 18-24 kg/mu, potash fertilizer (K2O) 48-60 kg/mu;
(4) All organic fertilizers and phosphate fertilizers were applied as base fertilizers, and the initial flowering period was mainly controlled. The nitrogen and potassium fertilizers of autumn and winter glutinous rice and winter spring glutinous rice were divided into 7-9 times of topdressing, and the nitrogen and potassium fertilizers of wintering long carp were divided into 10-14 times of topdressing. Pay attention to the application of high potassium compound fertilizer or water soluble fertilizer. The amount of nitrogen fertilizer applied per time does not exceed 4 kg/mu. (Source: Ministry of Agriculture)
This article URL: 2016 spring facility cucumber scientific fertilization technical guidance
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hydroponics system-nutrient technique (NFT)
NFT does not give average support to roots. Typically, the roots sit in a long sloping channel irrigation (Fig. 1.1). The nutrient is introduced into the high class of the canal and allowed to flow over the roots after which it drains into the nutrient tank. This is then re-pumped back into the channel to repeat the watering process.
This feed cycle can be intermittent or continuous. An & lsquo; The intermittent 'rss cycle is controlled by the clock and repeated several times per hour. this is sometimes called the "NFT pulse". The NFT pulse usually achieves better aeration of the roots as the roots are exposed to air between each feed. A & lsquo; continuous' rss cycle works non-stop. This is often used in commercial operations.
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