What are the dangers of excessive use of organic manure in vegetables?
2016-04-13 17:06:02
Organic fertilizer can improve soil physical properties and enhance water retention, fertilizer retention, continually improve the supply capacity, but excessive use of organic fertilizer will also affect the physicochemical properties of soil, causing serious soil salt accumulation, affecting crop growth. Moreover, excessive input of organic fertilizer can also make nitrate accumulate in vegetables, and more serious, excessive use of heavy metals contaminated urban garbage and other organic manure, soil and vegetables will cause heavy metal pollution. Therefore, a kind of method for rational application of organic fertilizer has been arranged in the ground net.
What's the harm of applying organic fertilizer?
, a selection of high-quality organic fertilizer:
high quality organic fertilizer is the base of high quality and high yield of vegetables, and now farmers applied organic fertilizer, mostly purchased fertilizer, quality is generally low, and some even with city sludge and garbage etc., is simply not up to the content of organic matter standard. Even if it is to buy some chicken, there are a lot of doping mud, or by some unscrupulous traders mixed with caustic soda (used to increase volume), these inferior organic fertilizers, the effect as can be imagined. Therefore, the production of high-quality organic fertilizer must be selected, the choice of organic fertilizer products, it is best to choose regular manufacturers.
What's the harm of applying organic fertilizer?
two, strictly control the use of organic fertilizer:
since many harmful organic fertilizer application, production in the future we should control its usage. So, what was the big Mu vegetable quantity in order to meet the needs of vegetable production? In my opinion, in general, 35~40 square meters of pure chicken manure and 15~20 square meters of rice husk and dung should be applied to vegetable fields per mu, and the amount of manure needed for Eggplant and dung vegetables is larger, so the upper limit is acceptable. Leafy vegetables need less fertilizer, so the lower limit is acceptable.
What's the harm of applying organic fertilizer?
three, with biological fertilizer application:
organic fertilizer, regardless of base and punch, it is best to use biological fertilizer. Why match biological fertilizer? Because the organic fertilizer in combination with biological fertilizer fertilizer, biological fungus fertilizer can accelerate the decomposition of organic fertilizer, so it is more conducive to the absorption of crops, but also some harmful substances in the decomposition and transformation of organic fertilizer, to avoid the damage to vegetables. Therefore, when applying organic fertilizer according to the base, 150~200 kg of biological fertilizer can be combined with each mu of land, and when applying the fertilizer, the biological fertilizer 20&mdash can be matched with each mu, and the effect is better by 25 kg.
