How can cherry tomatoes be grown to achieve high yields?
1. Throw the seedlings at the right time to give full play to the advantage of early and rapid growth. 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, the seedlings can be thrown once they have about three leaves. The shorter the seedlings, the faster they establish and resume growth, and the...
1. Throw the seedlings at the right time to give full play to the advantage of early and rapid growth. 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, the seedlings can be thrown once they have about three leaves. The shorter the seedlings, the faster they establish and resume growth, and the better they can give full play to the advantage of early and rapid growth from seedling throwing, resulting in higher yields. Generally speaking, sowing in mid to late March is more suitable for seedling throwing and raising.
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 has generally remained at 40-50 trays, about 18,000-20,000 hills. This is based on transplanting density and ignores the fact that thrown seedlings grow faster, more, and better than transplanted seedlings. Therefore, it often leads to problems such as excessive density, uncontrollable ineffective tillering, many pests and diseases, and lodging. To change this phenomenon, the fundamental solution is to control the seedling-throwing density. Throwing 30-35 trays of seedlings per mu of main field (25-30 trays for factory seedling raising), about 12,000-15,000 hills, is best, which saves seeds and increases yield.
3. Master seedling-throwing techniques to reduce gaps and the need for replanting. 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, first throw 70% of the seedlings, then use the remaining 30% to fill in empty spots. Be careful to walk around the edges; do not step on the places where seedlings have been thrown, to prevent footprints from being too deep and the seedlings sinking into them 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 throwing is uneven, replant 4-6 days after throwing, once all the seedlings have stood upright. 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, while urea can be applied before throwing the seedlings. Tillering fertilizer should be applied early rather than late, once each 5, 10, and 15 days after throwing, combining urea and potassium fertilizer. Panicle fertilizer should be applied once each 35 and 55 days after throwing, combining compound fertilizer and potassium fertilizer.
5. Drain and sun the field in time to prevent pests, diseases, and lodging. Start draining and sunning the field 25-30 days after throwing the seedlings to increase air in the soil and improve the vigor of the rice root system, which can both reduce the occurrence of pests and diseases and increase lodging resistance. The duration of draining and sunning depends on the weather. Generally, it is required to sun until no footprints remain when a person walks in, and afterward keep the field alternately dry and moist.
6. Do a good job of pest and disease control to ensure high and stable yields. When growing 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 breaking stage and full heading stage, spray "Fuji No. 1", "Kewenjing", and others to control panicle neck blast, so as to ensure high quality and high and stable yields.