Shundou 92-51 (soybean)
I. Source of varieties
Zhang Youyi, Niulanshan Town, Shunyi District, Beijing, was bred in 1992. Original code: 92-51, parent combination: Dun Zi yellow × red soybean. It was approved by Beijing in 2002.
2. Characteristic characteristics
Spring sowing soybean varieties, the whole growth period is 135 days. Growth and sturdiness at seedling stage, plant height about 70 cm, more than 4 branches, oval leaves, sub-limited podding habits, white flowers, brown pods, gray velvet, round and yellow grains, glossy, some seeds have red halo, larger seeds, 100-grain weight 22-23 grams. The average yield per mu is 155.8 kg in regional test and 170kg per mu in production test.
It has good resistance to stress, insect and mosaic virus, strong lodging resistance and good adaptability.
III. Key points of cultivation techniques
When sowing, diammonium is used as seed fertilizer, 5-10 kg per mu. There should be no shortage of water before and after flowering, otherwise the plant height and branching should be affected, the soil moisture should be sufficient during the grain filling stage, and the drought should be irrigated to make the grains large and improve the quality.
This variety likes fertilizer and water, and it should keep more than 12000 seedlings per mu in high fertilizer and water plots and more than 12000 seedlings per mu in medium fertilizer plots.
IV. Areas suitable for planting
It is suitable for spring sowing in Beijing.
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New techniques for high yield of soybean with four changes and one increase
The traditional ploughing and sowing method of planting soybean, the row is narrow, too dense, coupled with many other reasons, the yield has always hovered around 100~150kg. After years of experimental research, we have explored a new way to increase soybean production by more than 40%, that is, "four changes and one increase" technology. In order to increase soybean yield, we should not only select new varieties with high quality and high yield, but also pay attention to crop rotation. According to the experiment, after continuous cropping for many years, soybean showed slow growth, short plant, yellow lower leaves, early defoliation, few pods and small seeds. The experiment also proved that continuous cropping (even
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Prevention and treatment of soybean deficiency
The expression of lack of trace elements in soybean is as follows: the true leaves of spring soybean are yellow, which can be yellowed from the bottom up, there are parallel continuous or discontinuous iron patches along the veins of the compound leaves, and chlorosis extends from the tip of the leaves to the base, so that the whole leaves are light yellow, and the veins of the leaves are also green; the leaves are small and thin, easy to fall off, the stems are slender, the lower leaves of the plant are dark green, thick, uneven and long; when the scale deficiency is serious, the veins are yellowish brown, and then the whole leaves are yellow. The potassium deficiency leaves yellowed and the symptoms developed from the lower leaves to the upper leaves; the leaf margin began to produce chlorotic spots and spread.
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