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How to skillfully prevent early flowering of rapeseed
Rapeseed early flowering means that rape blossoms before winter or in winter. Due to the low temperature at that time, this flower was not a valid flower that was not a normal result. It was an abnormal flowering phenomenon. The ability of cold-resistance of early rapeseed in early rape blossoms obviously weakened, and it was very vulnerable to freezing injury. The rate of broken moss and dead plants was high and the number of fallen flowers was serious, which had a great impact on rapeseed yield. In this regard, prevention and control must be carried out. The methods are as follows: 1. Proper sowing: Select the appropriate variety and determine the appropriate sowing date according to the different characteristics of the variety. Plants with strong winter and late maturity can be properly sown early; early spring and early maturing varieties can be properly sowed. Second, the cultivator loose soil: cultivating loose soil can damage part of the root system, has played a certain inhibitory effect on the growth of rapeseed, thus delaying bolting. The ripping soil can also improve the permeability of the soil, which is conducive to the normal growth of rapeseed plants. Third, the topdressing top dressing: in combination with cultivator loose soil, timely application of quick-acting fertilizer, to make up for the lack of nutrients in the plant body, delay the transition from vegetative growth of rapeseed to reproductive growth, prevent early flowering early. Each mu can be applied to 30 tons of animal manure or ammonium bicarbonate 10 kg, depending on the amount of fertilizer depending on the situation, weak seedlings more Shi, Miao Miao less facilities. Fourth, timely picking of moss: Picking moss has the effect of promoting branching, increasing the number of fruit pods, and increasing yield. When the rapeseed is extracted and grows to 10 to 23 centimeters, the moss can be picked, and 10 to 13 centimeters of moss is removed by oblique cutting with a small, sterile blade. Picking moss should be carried out on a sunny day. When the cold wave arrives, picking up the moss should not be done to prevent the wound from being rotted and infected. After picking the moss, Mushi applies 2 to 3 kilograms of urea to promote the healing of wounds as soon as possible, and the branches will germinate rapidly to make up for the loss caused by removing the inflorescence.