Kiwifruit planting technology: why is kiwifruit green?

Why do kiwifruit turn green? Please introduce the reasons and control methods normal kiwifruit peel color should be brown or yellowish brown after ripening, but due to climate and management and other factors, some pericarp is emerald green or turquoise, flavor weakening, quality decline, not resistant to storage. Through comparative analysis, the author believes that the reasons for fruit greening are excessive planting density, exuberant vegetative growth, shaded crown, poor ventilation and light transmittance, and excessive use of expansion agent. Third, single fertilization, especially excessive use of nitrogen fertilizer, resulting in the imbalance of nutrients needed for fruit growth; fourth, a large amount of irrigation in the later stage, too much humidity in the field and too low ground temperature are not conducive to fruit ripening and coloring in the later stage. In order to solve the problem of fruit greening, we should start from the following aspects: 1. The planting density should be reasonable and take into account the demand for growth space of fruit trees in each growth period; summer pruning should be light to ensure a certain amount of branches and leaves, so that the leaf boundary ratio can reach 4-6 ∶ 1. Re-cut in autumn, shrunk the secondary or tertiary secondary shoots, leaving enough fruiting branches next year. Remove the thin and weak branches in the inner hall to reduce the workload of winter pruning, retain a certain ventilation zone between trees, improve ventilation and transmittance, facilitate fruit coloring and reduce green fruit. 2. By strengthening the management of soil fertilizer and water, reasonable flower and fruit thinning can be achieved to increase the number of fruits, increase yield and improve quality, and the use of fruit expanding agent is prohibited. 3. According to the tree potential and growth period, nitrogen fertilizer should be the main fertilizer before sprouting, phosphorus and potassium should be the main fertilizer in the fruit expansion period, nitrogen application rate should be strictly controlled in autumn, and foliar spraying should be strengthened. Improve and adjust the nutritional mechanism and promote sugar and color conversion. 4. after strictly controlling the amount of watering, kiwifruit enters the second growth peak, the autumn shoot grows rapidly, the tree is easy to grow, and consumes a lot of nutrition. Therefore, watering should be properly controlled after late July, and proper drought can control overgrowth of trees, reduce nutrient consumption, increase nutrients, accelerate sugar transformation and flower bud differentiation in the coming year, and make kiwifruit reach the standards of positive color, storage tolerance and excellent fruit after growth and maturity, so as to facilitate market sales. Click to get more kiwifruit planting techniques click to get more fruit planting techniques