In recent days, many vegetable farmers who planted peas in early spring have called in to reflect the fact that the grain size of oil beans is yellow and falling. I do not know how it happened? After detailedly inquiring about the conditions of their greenhouses, the reporter determined that the main reason for falling oil was mainly due to the low temperature in the early growth period. Improper watering is one of the reasons. So how can management be avoided in early spring? First of all, solve the problem of low temperature in the early stage of oil beans. Flower bud formation and development temperature is suitable for the temperature of 20-25 °C, less than 15 °C prone to incomplete flowers. Oil bud differentiation begins with the first 3-4 true leaves. If the temperature in the greenhouse is lower than 15°C, the flower buds will be poorly differentiated. This is why many vegetable farmers' oil beans reach a height of about 40 cm above the ground. There are still no major reasons for spending or blasphemy. To solve the early spring oil bean planting greenhouse temperature is the status quo is one of the key to ensure the normal flower bud differentiation of oil beans. In management, warming and insulation measures should be taken to ensure the normal temperature required for the growth of oil beans. The “four-film†covering insulation measures can be used to increase the temperature and keep warm. "Four membranes" refers to greenhouse membranes, two membranes, small dome membranes, and plastic membranes. Second, control the temperature during the flowering of oil beans. The temperature of the flowering pods of oil beans was higher than 30°C, and pollen increased infertility and poor fertilization. This was the main reason for falling flowers. With the increase of temperature, after entering April, a large number of oil beans have entered the flowering stage. In this period, it is necessary to strengthen ventilation and reduce the temperature of the greenhouse to 26-28°C to solve the problem of excessive flowering and falling temperature during flowering. Awkward phenomenon. In terms of management, if the temperature of the greenhouse is too high, the vents for the two membranes that can move are to be pulled down on the premise that all the ceilings of the arches should be released. If the night temperature is stable above 15°C, remove the two membranes. In addition, the problem of watering the oil beans during the flowering period. Many vegetable farmers are afraid to water during the flowering period. Their purpose is to be afraid of "boring flowers." Do not take watering measures even if the soil is too dry. In fact, this practice is wrong, the soil is dry, the humidity is too low, the pollen can not germinate normally, and the adhesion of the stigma of the pistil is poor, which is not conducive to pollination. Therefore, if the soil is too dry, it should be watered. But can not flood irrigation, because the humidity is too large when the pollen can not be normal rupture, pylori stigma adhesion concentration is reduced, is not conducive to fertilization and falling, which is what farmers say "boring flowers." Therefore, in this period, watering should be done with a small amount of water in order to achieve the required humidity when oil beans are in bloom. In early spring, the ground temperature is low, and there is plastic film covering, and the soil transpiration and moisture are few. Therefore, after irrigating the planting water, the vine is poured again when the vine is about 60 cm high, which basically ensures the required humidity during the flowering period of oil beans. If the soil is found to be dry after the water reaches the vine, the stem should be grown to about 180 cm and close to the wire used to hang the vine. This also solves the distress of watering during flowering.
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