Latest spring greenhouse management tips, growers please keep them handy
In spring, as temperatures rise, nighttime temperatures inside the greenhouse keep climbing too. At this time, if greenhouse management is even slightly improper, many problems will appear, which is extremely unfavorable to crop growth. So spring greenhouse management must pay attention to the following points. Join the editor to learn about them.
1. Prevent spindly growth
As temperatures rise and the difference between day and night narrows, plants and crops are highly prone to spindly growth, especially solanaceous and cucurbit vegetables, where it is most obvious. Once spindly growth occurs, flowers and fruits drop easily, and deformed fruits are also likely to form. To prevent spindly growth, first control the seedling age and transplant in time, so as not to miss the best planting time. Within 15-30 days before transplanting, complete soil preparation, fertilization and lighting, and at the same time dig drainage ditches for irrigation and drainage, so that in the rainy season water can be drained effectively and humidity lowered, which helps slow growth. When spindly growth has already occurred, take timely measures to reduce losses to a minimum. First, in combination with intertillage and weeding, cut off part of the root system to weaken root absorption capacity and control aboveground plant growth, but the main root should not be cut off. At the same time, use plant growth regulators to drench the roots and control spindly growth.
2. Prevent late spring cold
The most serious hazard in spring is simply cold, which has an enormous impact on crops. So after the seedlings emerge fully, the seedbed should be ventilated in time, and as temperatures rise, the ventilation amount should be gradually increased to improve low-temperature hardening of seedlings and increase their cold resistance. Before a late spring cold arrives, irrigate at the right time to reduce the degree of freezing damage, or use a sprayer to spray water on the plant surface to increase air humidity, which can delay freezing damage. In protected fields, before a cold wave arrives, a coal stove can be set up inside the greenhouse or electric heaters or heating blocks can be used for temporary heating to raise the temperature inside the greenhouse and prevent freezing damage, but once doing so, be sure to ventilate to avoid gas poisoning.
3. Prevent hormone poisoning
After temperatures rise, when doing flower spotting and melon dipping, the concentration of the spotting agent should also be reduced accordingly. Too high a concentration will affect flower bud differentiation of the plant, cause leaf wrinkling and deformation, and produce deformed fruits. When hormone poisoning occurs, first spray a large amount of clean water, which can both wash off the liquid on the plant surface and dilute the concentration of the liquid. At the same time, spray growth regulators to enhance recovery ability and quickly restore normal plant growth. After that, carry out topdressing, loosening the soil and lighting to enhance the plant's own recovery ability and relieve the phytotoxicity. At the same time, according to the agent that caused the phytotoxicity, spray the corresponding alleviating agent.
4. Prevent and control pests and diseases
After temperatures rise, pests and diseases also occur fairly commonly. Adopt measures with prevention first and integrated control to curb the spread of pests and diseases. For common vegetable diseases, spray control in time, and the same applies to insect pests. After entering April, with high temperatures and strong light, crops are highly prone to sunscald. Measures such as removing leaves and pinching off shoots can be taken, but not too many at one time. Spray foliar fertilizer to promote flowering and fruit setting and prevent physiological diseases.
The above is an introduction to spring greenhouse management tips. We hope it can help you. To learn more related knowledge, please follow us.