Comprehensive management of flowering and podding stage of soybean
Soybean enters the flowering and podding stage, during which vegetative growth and reproductive growth go hand in hand, and sufficient water, fertilizer and light conditions are needed. In cultivation measures, the coordination of vegetative growth and reproductive growth should be achieved to achieve multiple pods and many seeds. The main measures should be to achieve the following "three prevention" and strengthen the management of grain filling and maturity.
"three prevention" measures during flowering and podding period (1) to prevent prosperous growth: when soybean has seen 2 bolts blossom, 30 grams of 15% paclobutrazol wettable powder per mu, 40 kg of water, spray capping, can shorten internodes, control top rattan, increase flowers and protect pods, reach the top of pods; (2) drought and waterlogging prevention: soybean flowering period, we should pay attention to summer drought and waterlogging, drainage and waterlogging in time in case of severe waterlogging (3) Pest control: from the end of July to the middle of August, soybean bridge insects, bean diamondback moth, leaf borer, alfalfa night moth and other pesticides with contact and stomach toxicity such as cypermethrin plus dimethoate or dichlorvos can be used to eliminate the pests in the first and second instar stage.
In this period, the vegetative growth of soybean stops gradually, and the reproductive growth is exuberant. In cultivation techniques, it is necessary to protect leaves and increase grain weight, and many pods are full, so it is necessary to strengthen management. Before the middle stage of grain filling, it is very sensitive to water and needs a lot of water. timely watering in case of drought can increase yield; foliar fertilizer is sprayed with 5 grams (1 pack) of green fertilizer per mu to 50 kg of water, or a mixture of 1% urea and 23% superphosphate is sprayed on the back of leaves after 4 p.m., and the effect is quite good. Late August is the peak period for bean pod borer and heart borer, and fenitrothion or phoxim emulsion can be used to spray water per mu.
Timely and moderate harvest of soybeans has strict requirements on the harvest time, when the stems and pods all turn yellow, the pod neutrons detach from the pod wall, all the bean leaves fall off, the plants are shaken by hand, and the seed water content is reduced to about 20%, which is the best harvest time.
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What is the yellow leaf of soybean before flowering?
In recent years, yellow leaf disease has occurred widely in legume crops such as soybeans. If it is not controlled in time, it will cause serious harm to crop growth. Such as early onset, yellowing leaves, short plants, no pods. Mid-term disease, even if pods, there are no seeds, even if there are grains, but also shrivelled, resulting in a serious reduction in production or no harvest. The reasons are as follows: first, long-term application of chemical fertilizer, the reduction of farm manure, resulting in soil consolidation. Second, in recent years, it is common to use combine harvester and burn wheat stubble, which destroys the surface structure of the soil. Third, lack of elements.
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Efficient cultivation techniques of soybean intercropping muskmelon
Soybean 4 ∶ 2 intercropping muskmelon, muskmelon replanting Chinese cabbage in the next crop, three harvests in one area, and an income of more than 15000 yuan per hectare is a new planting model with high yield and high efficiency. 1. The new variety 1.1 soybean variety Jinta soybean with strong branching and super high yield was selected. Jinta soybean has six outstanding characteristics: ① has strong growth potential, Jinta soybean plant height is 70cm to 80cm, stalk is stout, and lodging resistance is high; ② has strong branching force, 8 branches per plant, up to 16 branches, branches up, and the plant is fan-shaped and non-branching, which is easy to overcome strong branches.
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