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How to mitigate continuous and alternate soybean cropping? Integrated measures are key
To minimize yield losses from continuous and alternate cropping, continuous and alternate soybean planting should be avoided as much as possible, rational crop rotation should be maintained, alternate cropping should be reduced, and continuous cropping should be controlled. In the long term, the area of continuous and alternate soybean cropping should not be expanded without limit, so as to avoid declining soil productivity and creating a vicious cycle. When continuous and alternate cropping is unavoidable, alternate cropping should be arranged first, and continuous cropping should be used only when alternate cropping cannot be arranged, and continuous cropping must not exceed two years. In response to the causes of yield reduction under continuous and alternate cropping, with emphasis on regulating nutrition and controlling pests and diseases, existing scientific
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Introduction to the Characteristics and Traits of the Jiaoxuan No. 2 Soybean Variety
Jiaoxuan No. 2 fresh soybean is an excellent spring soybean variety bred by Shanghai Jiao Tong University. Through trial planting and demonstration, this variety has shown stable traits, good uniformity, evenly distributed pod setting, white pubescence and wide pods, plump seeds, and a high proportion of three-seed pods. Compared with Taiwan 75, when sown at the same time, it comes to market 10 d earlier, has good economic benefits, and is deeply favored by farmers. I. Characteristics and Traits Jiaoxuan No. 2 soybean belongs to the early-maturing spring soybean varieties, with a spring sowing growth period of 75--80 d. Determinate pod-setting habit, plant height 50--60 cm,
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Prevent soybean flower and pod drop: early prevention is key
Soybean flower and pod drop is a major factor limiting soybean yield increases. In production, the rate of soybean flower and pod drop generally reaches about 45%-70%. The most flowers drop 3-5 days after flowering, and the most pods drop 10-15 days after flowering. To increase soybean yields, substantial effort must be devoted to preventing flower and pod drop. 1. Causes of flower and pod drop 1. Poor ventilation and light penetration: excessive planting density and poor planting techniques cause excessive vegetative growth, too
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Characteristics of the Jinda 74 soybean variety
Jinda 74, a new soybean variety recently bred by Professor Li Guiquan, a soybean expert at Shanxi Agricultural University, has become one of the 3 new soybean varieties most recently approved this year by the Shanxi Provincial Crop Variety Approval Committee, thanks to its advantages of strong drought resistance, good yield performance, high resistance to mosaic virus, and great yield-increasing potential. Jinda 74 was developed by crossing and selecting Jinda 52 and Jinda 47. It is a dual-purpose variety for both spring and summer sowing, and is especially suitable for planting in land with high fertility and ample water. Experts say that under conditions combining good seed, good methods, and good land, the yield can
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Introduction to the Characteristics and Traits of the Jindou No. 20 Soybean Variety
Characteristics and Traits: Plant height 90-110 cm, 3-5 branches, 23 nodes on the main stem, seedlings grow robustly, thick roots and stems, many root nodules, strong stalks, drought-resistant, lodging-resistant; yellow seed coat, black hilum; 100-seed weight 20 grams, protein content 40.2%, fat content 20.6%, spring sowing growth period about 136 days; summer sowing 90-95 days. In the 1992 variety comparison trial, the yield per mu was 263.5 kg, an increase of 11.27% over the control. From 1995 to 1996, it participated in the medium-late maturing
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Introduction to the Characteristics of the Jindou No. 21 Soybean Variety
Characteristics This variety is a new soybean variety with high drought resistance and tolerance to poor soil. When spring-sown in the loess hilly region of western Shanxi, its growth period is 140-145 days. Plant height 90 cm, number of nodes on the main stem 21, branches 6, pods per plant 79, seeds per plant 150-160. Oval seeds, yellow seed coat, light brown hilum, 100-seed weight 15.0 g, average yield 120-160 kg per mu. Breeder: Institute of Economic Crops, Shanxi Academy of Agricultural Sciences. Region and technology: Jindou No. 21 has been proven through multi-site trials in Shanxi Province to be suitable for planting in the loess hilly region of western Shanxi.
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Jindou No. 29 (Soybean, original name: Fendou No. 53)
Characteristics: Purple flowers, brown pubescence, round leaves, indeterminate pod-setting habit. Average growth period 106.5 days, plant height 71.9 cm, effective branches 2.6, effective pods per plant 38.1, seeds per plant 91.3, 100-seed weight 17.6 g. Seed coat yellow, light brown hilum, round seeds. Average crude protein content 38.1%, crude fat content 22.11%. Yield performance: In 2002, it participated in the summer soybean variety regional trial in the central Huang-Huai-Hai region, with an average yield of 170.93 kg per mu, an increase of 10.71% over the control Ludou No. 11
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Detailed Explanation of Cultivation and Management Methods for Jinyi No. 30 Soybean
Narration: Jinyi No. 30 is a new high-yield soybean variety developed by the Institute of Crop Genetics, Shanxi Academy of Agricultural Sciences through years of crossbreeding and selection. After maturity, this variety can reach a plant height of 85-102 cm, with a well-developed root system that penetrates deeply into the soil, thick and sturdy roots and stems, a compact plant shape, and deep yellow, glossy seeds with a 100-seed weight of approximately 22.2 grams. It is a high-quality medium-to-late maturing soybean variety. Zhang Haisheng (Associate Researcher, Institute of Crop Genetics, Shanxi Academy of Agricultural Sciences): Drought resistance, disease resistance, oil extraction rate, and quality. Narration: Jinyi No. 3
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Soybean Disease Control Technology: How to Use Junke Duke
Junke Duke (2% Ningnanmycin aqueous solution) is a brand-new biological pesticide successfully developed by the Chengdu Institute of Biology, Chinese Academy of Sciences. It features high efficiency, a broad spectrum, environmental friendliness, and the ability to promote crop growth and improve quality and income. It has a very good control effect on soybean root rot, phytophthora blight and other diseases. I. Control of Soybean Root Rot 1. Symptoms When infected at the seedling stage, brown oval, elongated or irregular lesions form on the diseased plants and the base of the stems, slightly sunken, then developing into large patches surrounding the main stem and even damaging the lateral roots. In the later stage, the roots of diseased plants turn dark brown, the epidermis rots, and the lateral roots and fibrous roots are few or necrotic. The diseased plants are stunted and yellow, and the lower leaves drop early. Except for a few seriously damaged at the seedling stage, diseased plants generally do not die, but they bear few pods and few seeds, affecting yield.
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Detailed Introduction to the Soybean Variety Kangxian 2
Kangxian 2 was developed by the Saline-Alkali Land Crop Breeding Research Institute of the Heilongjiang Academy of Agricultural Sciences in collaboration with the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences. In 1982, a sexual cross was made using Nenfeng 9 as the female parent and (Nenfeng 10 x Frenklin) F2 as the male parent. The progeny were continuously planted and identified in a soybean cyst nematode disease nursery, combined with southern multiplication and generation advancement, and selected and bred using the modified pedigree method, producing a new soybean variety with high resistance to soybean cyst nematode. Original code: Fuyu 8201-205. Characteristics: This variety has an indeterminate podding habit, a plant height of about 95 cm, and the main stem has 16 to
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