How to plant tomatoes on a large scale in Cangzhou area?
Analysis and explanation:
Xian county has a temperate continental monsoon climate with four distinct seasons: spring, summer, autumn and winter.
The annual precipitation is 560 mm, the annual sunshine is 2800 hours, the frost-free period is 189 days, and the annual daily average temperature is 12.2℃.
Tomato is a kind of temperate vegetable, which is widely planted in the north and south of China.
So this area can also be cultivated.
Training points:
Early-maturing cultivation in Qiandongnan should be planted in the middle and late October of 165438+ 10, and in other places it should be planted in the middle and late February of 65438+and in the middle and late May as autumn extension cultivation.
Tomatoes can tolerate drought, but not waterlogging, and the requirements for soil are not very strict. To obtain high yield, we must choose soil with deep soil layer, loose and fertile soil and strong water and fertility conservation.
In the selection of varieties, it should be noted that early-maturing varieties should be selected in early spring or late autumn, and mid-late-maturing varieties should be cultivated in regular seasons.
After deep ploughing and harrowing, it was opened into a carriage with a width of 80 cm and a height of 16-24 cm. The width of the compartment ditch is 33 cm, and 2 rows are planted in each compartment.
When applying fertilizer, the reasonable ratio of nitrogen, phosphorus and potassium is 1: 1:2, and 3000-5000 kg of decomposed organic fertilizer, 25 kg of calcium superphosphate and 20 kg of potassium fertilizer (or 80 kg of plant ash) are applied in combination.
Timely sowing and reasonable close planting: early-maturing cultivation in protected fields in spring should be planted in cold weather from late February to early March; Plastic film mulching cultivation in the open field was planted around March 20 when the weather was cold.
The planting density is about 3000 plants per mu, and the spacing between early-maturing varieties is 50×30 cm. About 3500 plants per mu were pruned by single stem for middle and late maturing varieties; When pruning two stems, there are about 2000 plants per mu.
Pruning, reaching for the frame and tying the vine: put a herringbone frame after the first ear fruit bears. There are two main pruning methods. One is to leave only the trunk and remove all the side branches (it is advisable to remove the side branches when they are 4-7 cm long), which is called single stem pruning.
The other is to leave side branches under the first inflorescence except the trunk, and all other side branches are removed, which is called double trunk pruning. No matter which pruning method is adopted, attention should be paid to tying vines in time.
Appropriate topdressing during tomato growth period, not partial application of nitrogen fertilizer, must be combined with phosphorus and potassium fertilizer.
Generally, seedling-promoting fertilizer is applied after slow planting to promote the growth of stems and leaves.
After the first ear fruit begins to swell, the second topdressing is needed to promote the fruit swelling, and the middle and late-maturing varieties need topdressing for 3-4 times after the first and second ear fruits are harvested.
During fruit growth, foliar topdressing with 1.5% calcium superphosphate or 0.3% potassium dihydrogen phosphate solution is beneficial to fruit ripening and increase yield.
After slow seedling planting, intertillage should be used to conserve moisture, and irrigation should be controlled when the inflorescence blooms for the first time to prevent the stems and leaves from growing too fast and flowering and fruit dropping.
After the first ear of fruit is set, the plant needs more water and should be irrigated in time. Pay attention to drainage in rainy season.
Pick fruits at the right time. There are four stages of tomato ripening: green ripening, discoloration, ripening and full ripening.
Storage and preservation can be harvested at green maturity.
Transportation and sales can be picked during the discoloration period (1/3 fruits turn red).
Local sales or self-consumption should be picked at maturity, that is, when the fruit turns red above 1/3.
note:
Source: Hebei News Network.
/20 10-08/23/content _ 577 108 . htm