For vegetable growers, no matter what they grow, they want high yield and excellent yield, because only high-quality vegetables can be sold at an ideal price, only high yield, in order to make their own greater economic benefits, at present, greenhouse planting is a very prevalent planting method, because it can be planted in all seasons of the same vegetable or a variety of, without seasonal restrictions. So how can greenhouse vegetables be high yield? Take a look at the greenhouse vegetables high-yield fertilization techniques!
First, the fertilization method should be scientific
Base fertilizer should be applied 7-15 days before planting vegetables, application must be mixed evenly with the soil; fertilizer to be 10 centimeters away from the plant ditch / hole, fertilizer should be mulched in a timely manner and watering; roots outside the fertilizer (spray foliar fertilizer) * application period in the vegetable fertilizer and growth of the late stage, spray **** best time in the evening or cloudy days, spraying parts of the new leaves and the back of the leaf effect *.
Second, the amount of fertilizer to be reasonable
Greenhouse greenhouse fertilizer loss rate is low, many farmers tend to over-fertilization and irrational fertilization problems, on the one hand, resulting in shed fertilizer; on the other hand, shed fertilizer should control ammonia fertilizer, increase the application of phosphorus and potassium fertilizer, control the use of nitrate nitrogen fertilizers, ammonium nitrate, nitrate of phosphorus, nitrate of potash, etc., and also is not suitable for the use of easy to reduce the quality of vegetables, resulting in soil condensation of potassium chloride, ammonium chloride and other chlorinated class Fertilizers, for vegetable absorption difficulty, easy soil residue of magnesium sulfate, iron sulfate sulfate and other sulfate ion fertilizers; in addition, because ammonium carbonate is easy to volatilize to make the vegetable damage, should also be limited use.
Third, the bottom of the fertilizer should be applied as early as possible
For winter and spring crop production of vegetables, you can advance the time of land preparation to mid-September. Fertilizer to organic fertilizer-based, chemical fertilizers, in advance of the farmyard manure fully rotted sprinkled to the surface,grow bag for blueberry plants and then turned 30 centimeters deep into the soil. Be sure not to use unripe farmyard manure or farmyard manure heaped into the shed to ripen, both easy to bring the manure in the pests and diseases in the shed, but also easy to make the vegetable seedlings by the ammonia produced in the fermentation of farmyard manure burns.
Fourth, fertilizer to be flexible
Vegetable fertilizer, according to crop species in the seedling, flower, fruit and other fertilizer needs of different reproductive periods of the law, especially to strengthen the peak demand for fertilizer in a timely and adequate amount of fertilizer, fertilizer category to combine specific vegetable categories of nutrient demand selection ratio, not blindly use, fertilizer must also be watered in a timely manner to dilute, so as not to cause fertilizer concentration is too large and burn seedlings.