Tomatoes are best planted in the fall.
Autumn and winter stubble and winter and spring stubble tomato is an important stubble of winter warm plastic greenhouses. Mature greenhouses, due to years of organic fertilizer and chemical fertilizer inputs, the soil has been very fertile, so the bottom fertilizer should be light. Empirical data show that about 8 years of shed, it is recommended that the bottom of the autumn and winter stubble tomato fertilizer with high potassium compound fertilizer 25 kg / mu or so.
The shorter the age of the shed, the higher the corresponding amount of bottom fertilizer, the high limit of 75 kg / mu. If the autumn and winter stubble planting time in September, the seedling temperature is suitable, grow strong, the bottom fertilizer can be less or no organic fertilizer. Organic fertilizer to give the planting period in the winter and spring stubble, can play a ground temperature, the role of yield.
Based on the number of spikes to determine the amount of fertilizer, should be fertilized to yield. If *** stay 6 spikes of fruit, respectively, in the first, 3, 5 spikes of fruit expansion of fertilizer 3 times. If *** stay 4 spikes of fruit, in the first, 3 spikes of fruit expansion fertilizer 2 times. When planting a large amount of fruit, you can increase the fertilizer once. Fertilizer to potassium sulfate-based fertilizer, formulated to high nitrogen, low phosphorus and high potassium is good, the amount of 20-30 kg / mu / times. When the ground temperature is low, with organic matter such as xanthate is better, in order to buffer the impact of pure chemical fertilizers on the ground and the root system.
In the trace elements, tomato demand for calcium, magnesium, boron, zinc and iron is more. Supplementation of these elements should be carried out from the bottom of the application, follow-up application and foliar spray fertilizer in three aspects. The bottom of the supplement can choose the excellent force boron zinc, silicon calcium magnesium, calcium magnesium phosphorus, Rui green iron fertilizer and so on. Follow-up with the compound fertilizer supplement once that is OK.