Technical regulation of soybean thin-planting and high-yield cultivation?
Technical regulations for sparse planting and high yield cultivation of soybean:
First, select special varieties: select branched varieties, with tall and luxuriant plants, strong culms, long flowering period, large flower clusters, high pod setting rate, high fertilizer and water tolerance, middle or late maturity varieties.
2. Land selection and tillage fertilization: select fertility plots such as plain land and stubble land with high soil organic matter content and good water conditions, the best former stubble is corn stubble, and organic fertilizer should be applied.
Third, sowing: select seeds. Disease-free insects, uniform and full seeds. The sowing period is generally stable at a ground temperature of 5 cm and above 6 degrees Celsius. The density ranges from 180000 to 270000 plants per hectare. The use of double precision on-demand on the ridge, sowing depth of about 5 cm, seed fertilizer applied to 3 to 5 cm, do not put seeds and fertilizer together, so as not to burn seedlings.
4. mid-tillage management: sparse planting cultivation should carry out 3-4 times of mid-tillage in order to increase soil temperature, accumulate water, promote soybean root growth and nitrogen fixation by rhizobium, and pull up grass manually once in the middle stage of growth. Foliar topdressing and pest control. The more times of foliar topdressing, the more significant the effect of increasing yield. When diseases and insect pests occur, they can be used to control diseases and insect pests at the same time. The first topdressing was carried out at full flowering stage, the second was carried out at podding stage about 10 days after the first foliar topdressing, and the third foliar topdressing was carried out at grain filling stage for the purpose of promoting early maturity and increasing grain weight.
Fifth, timely harvest: artificial harvest should be carried out at the end of yellow ripening, and mechanical harvest should be carried out at the early stage of ripening.
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Soybean bacterial spot disease
Symptoms: damage to seedlings, leaves, petioles, stems and pods. The cotyledons of the seedlings were infected with semicircular or subcircular brown spots. Leaves infected with primary chlorosis irregular small spots, water stains, expanded polygonal or irregular shape, the size of about 3-4mm, dark brown to dark brown in the middle of the disease spot, with a narrow halo ring on the periphery, and the disease spot fused into dead patches. The stem was dark brown water-stained strip at the beginning of the disease, irregular after expansion, slightly sunken. Dark brown strips infected with pods and beans
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Why do soybeans spend but not bear fruit?
Xiaonan District Xinpu Town Xihe farmer Liu Dezheng and some farmers in Xiaogang Town and other places asked: why do soybeans (soybeans) blossom this year without pods or empty pods? According to our field investigation, in fact, the vast majority of soybeans this year are fruiting, and it is a phenomenon that flowering does not bear pods or empty pods are shrunken seeds in local areas and a small number of farmers. Through field investigation and analysis, there are mainly the following reasons. First, from the perspective of variety. This year's early and middle maturity varieties generally blossom and bear pods better, while some of the late maturity varieties are sown better.
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