How to cultivate cherry tomatoes for high yield? These six steps are key
1. Throw the seedlings at the right time to give full play to the advantage of early growth and rapid development. Rice seedling trays contain little soil, so on the premise that the seedlings can be picked up without the soil falling apart, the earlier they are thrown, the better. Generally, 15-20 days after sowing for the early crop and 8-10 days for the late crop, when the seedlings have about three leaves, they can be thrown. The shorter the seedlings, the faster they stand and resume growth, and the more fully they can...
1. Throw the seedlings at the right time to give full play to the advantage of early growth and rapid development. Rice seedling trays contain little soil, so on the premise that the seedlings can be picked up without the soil falling apart, the earlier they are thrown, the better. Generally, 15-20 days after sowing for the early crop and 8-10 days for the late crop, when the seedlings have about three leaves, they can be thrown. The shorter the seedlings, the faster they stand and resume growth, and the more fully they can give play to the advantage of early growth and rapid development from seedling throwing, and the higher the yield. Generally speaking, sowing for seedling throwing in mid to late March is more suitable.
2. Control the seedling-throwing density to reduce the occurrence of pests and diseases and enhance lodging resistance. In recent years, the number of seedling trays thrown per mu of main field in various places has generally remained at 40-50 trays, about 18,000-20,000 hills, which is determined based on transplanting density and ignores the characteristics that thrown seedlings grow faster, more, and better than transplanted seedlings. Therefore, it often leads to excessive density, uncontrollable ineffective tillering, many pests and diseases, and lodging and other undesirable phenomena. To change this phenomenon, the fundamental way is to control the seedling-throwing density. It is best to throw 30-35 trays of seedlings per mu of main field (25-30 trays for factory seedling raising), about 12,000-15,000 hills, which saves seeds and increases yield.
3. Master seedling-throwing techniques to reduce replanting and missing seedlings. Before throwing the seedlings, the main field should be leveled and divided into beds (each bed 2-3 m wide). The seedlings should be quantified (divided by bed or by area). When throwing the seedlings, first throw 70% of the seedlings, and use the remaining 30% to fill in the blank areas. Note that people should walk around the edges, and the places where seedlings have been thrown should not be stepped on, to prevent footprints from being too deep and the seedlings sinking into the footprints and drowning. In addition, harrowing the field one day in advance and letting the soil settle before throwing the seedlings gives better results. If the seedling throwing is uneven, replant 4-6 days after throwing, when all the seedlings have stood, and it is best not to replant immediately after throwing.
4. Apply sufficient base fertilizer and topdress in time. Applying sufficient base fertilizer is fundamental to rice production, and seedling throwing is no exception. When preparing the main field, 40%-60% of the fertilizer can be applied. Organic fertilizer and phosphate fertilizer are better if composted in advance for one month. Organic fertilizer, phosphate fertilizer, and ammonium bicarbonate should be applied when harrowing the field, and urea can be applied before throwing the seedlings. Tillering fertilizer should be applied early rather than late, with one topdressing each 5, 10, and 15 days after throwing the seedlings, combining urea and potassium fertilizer. Panicle fertilizer should be applied once each 35 and 55 days after throwing the seedlings, combining compound fertilizer and potassium fertilizer.
5. Drain and sun the field in time to prevent the occurrence of pests and diseases and lodging. Drain and sun the field 25-30 days after throwing the seedlings to increase air in the soil and improve the root activity of rice, which can both reduce the occurrence of pests and diseases and increase lodging resistance. The time for draining and sunning the field depends on the weather. Generally, it is required to sun it until no footprints remain when a person walks in, and afterward keep it alternately dry and wet.
6. Do a good job in pest and disease control to ensure high and stable yield. When planting high-quality rice, pest and disease control is key. In particular, the disease resistance of high-quality rice is often inferior to that of hybrid rice, so disease control must be especially emphasized. When draining and sunning the field, spray Tian'an to prevent sheath blight; at the booting stage and full heading stage, spray "Fuji No. 1", "Kewenjing", etc. to control panicle neck blast, so as to ensure high quality, high yield, and stable yield.