Some farmers will encounter such problems when planting rapeseed, that is, the rapeseed in the field is not podted, the pods are few, and the pods are not real. In fact, this is the problem that rapeseed growers often encounter “flowers and not realâ€. It is caused by improper field management and fertilization. Let's talk about it separately: how to prevent the problem of "flowers and unreality" in rapeseed and the coup to increase production of rapeseed. For your reference.
First, rapeseed "flowers and not real" prevention and treatment methods
1. Boron deficiency is the main cause: rapeseed is a sensitive crop for boron. The problem of “flowers and unreality†in most rapeseed is caused by insufficient boron. The lack of boron in the seedling stage of rapeseed will cause the leaves to appear dark, curling, shrinking and so on. The lack of boron in the bud stage will make the leaves yellow brown, the flower buds withered, and the stems thin and short; while the boron deficiency during flowering will cause the rape branching frequency. The problem of raw, only flowering is not fruitful, results are small, or grain is not real.
Control method:
1 base application of boron fertilizer: in the application of base fertilizer, 0.5 kg of borax can be applied per acre to ensure the demand for boron in the growth period of rapeseed;
2 Spraying boron fertilizer: For the boron-poor rape plot, you can spray 1-2 times of borax aqueous solution (50 kg) with 0.3-0.4 concentration in the seedling stage, the bud stage and the early flowering stage of rapeseed. Boron nutrition can not only effectively prevent the problem of rapeseed, but also effectively increase the number of pods, grain fullness and increase the yield in the later stage. Note: Before using borax, it must be dissolved with a small amount of warm water and then sprayed with water; spraying is not as late as possible.
2, other secondary causes: the purity of rapeseed hybrids is not enough, low flowering period or continuous strong precipitation weather, poor pollination quality, herbicide phytotoxicity, excessive application of nitrogen fertilizer, etc. will also cause rape problems occur, it is recommended that everyone Strengthen and improve relevant field management measures based on their own situation.
Second, rapeseed production management tips
1, gibberellin: before the rapeseed planting with gibberellic acid solution roots, spraying gibberellin on the leaf surface of the flowering period, can play the role of promoting seedling, full seed, and increase production. Solution preparation method: 0.6-1 g of 85% gibberellin is dissolved in an appropriate amount of white wine, and 30-50 kg of water liquid is added.
2. Brassin: In the bud stage, early flowering stage and early stage of pod, spray 1500 times 0.04% aqueous solution of brassinolide 50-60 kg/mu, which can strengthen the seedlings and increase the knot. The pod can promote the fullness of the grain and increase the grain weight, and has a very small yield increase effect.
3. Paclobutrazol: In the seedling stage and initial stage of rapeseed, spraying 50-60 kg of 15% multi-effect water solution per mu, which can increase the root growth of the seedlings, increase the photosynthesis nutrient production and reduce the seedlings The nutrient consumption caused by the long growth of the plant promotes multi-pod and firm pods, and it also has a good yield-increasing effect.
4, potassium dihydrogen phosphate: in the rapeseed period, spraying an appropriate amount of potassium dihydrogen phosphate + urea aqueous solution, can increase the nutritional supplement of the seedlings, so that the rapeseed pods are full, the seeds are full, there will also be a very good yield increase effect.
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