The adaptability of the bean is strong, the optimum temperature for growth is 20~25°C, and the optimum temperature for flowering and scabbing is 25~28°C. It is not very resistant to low temperature, and is easily damaged when the temperature is lower than 5°C. Therefore, winter beans, field tube more critical. 1, nursery. In the past, the production of beans was mostly broadcast, and Miao Qi Miao Zhuang was guaranteed on the basis of fully protecting the roots from cold damage. Early sowing, early harvest, and early morning market were possible. The production of multi-nutrient seedlings, but also can use 50 hole plug seedlings, seeding 2 to 3 seeds per hole, irrigating the water, reasonable control of temperature, not only to avoid the seedling "red root" phenomenon, but also to prevent leggy. The seedling age is about 25 days or so. 2, rational close planting. As the seedlings grow at low temperature and low light conditions. Photosynthesis is hindered, and the nutrition of the plant itself is limited. Therefore, it must not be too dense during planting to prevent the leaves from blocking each other. Generally take 70 cm, 50 cm size ridge (or double high ridge) colonization, plant spacing of about 30 cm, after planting watering, and then scratching and then cover the entire film. 3, field management. In winter, it is better to cover and keep warm, strengthen lighting, and often wipe the shed film to make it shine well. It is best to hang a light curtain in the shed. In the management of fertilizer and water, from transplanting to flowering, water control and cultivating roots should be used to promote rooting. Water should be kept as low as possible. Before the flowering of the beans, 15 kg of ammonium sulfate should be applied. During the clams, fertilizer is topdressed every 10 to 15 days, each time 15 to 20 kg of ammonium sulfate is applied. If conditions permit, sunny day after morning, topdressing with carbon dioxide gas fertilizer, proper ventilation after 2 hours after application. The senescence of the plants in the late growth period of the beans, and the aging of the roots, can prolong the scarring and spray 0.2% potassium dihydrogen phosphate for foliar application. After the bean vines reach the vines, the vines are erected in a timely manner. In addition, the pods must be smashed and wiped in time to avoid light blocking between the leaves. When the plant height is 2 to 2.5 meters, the hearts are picked in time to promote scab. Pay attention to knock down the old leaves after each harvest. 4, timely harvest. The beans should be harvested in time to prevent premature senescence, which can generally be harvested 13 to 16 days after flowering. Green beans are grown in greenhouses. Because they are in a low-temperature, high-humidity environment and have poor ventilation, they are prone to rust. They should be prevented and treated in time. You can also choose to put a small breeze at noon on sunny days to reduce the humidity. Deep Intra Uterine Insemination Catheter Deep Intra Uterine Insemination Catheter,Artificial Insemination Catheter,Animal Softrandtificial Insemination Catheter,Silicone Veterinary Insemination Catheter Jinan Mucho Commercial Inc. , https://www.muchovet.com