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Shanghai Oil 15 Department of Crop Science, Shanghai Academy of Agricultural Sciences in 1997 in Hunan province double low rape strain "23010" and Zhejiang double low rape strain "Jian7" hybrid F4 generation and Jiangsu Province double low strain "AB448" and Shanghai The city’s main breed, F4, which is a hybrid of the oil 50, has been double-crossed and has been selected for several generations. Adapt to planting in the middle and lower reaches of the Yangtze River.
Characteristics:
Seed traits: seed ball, seed coat dark brown, about 4.0 grams of grain weight.
The traits of pods: pods are straight, pods are long, skins are thin, and when they are ripe, pods are yellow, about 22 per horn.
Plant traits: Cotyledon kidney-shaped, young stem green, lighter leaf color at the seedling stage, wax powder, deep lack of carving, short petiole, 2 pairs of lateral cracks, strong serrated edge, clear veins. The plant height is about 160 cm, and the plant type is spinning down. The branches are lower, about 40 cm, and the branches and stems have a larger angle of implantation. One effective branch is about 9 and the second branch is 4 to 5, and the effective number of pods per plant is about 380 degrees. During the seedling period, the growth is weak, the spring is strong, and the buds grow well. Age is strong and flexible. The moisture resistance is weak and the resistance to lodging is strong.
The whole growth period: sowing in September, mature in late May next year. The whole growth period is about 238 days.
Yield performance: Generally 140 kg per mu, high-yielding fields up to 250 kg.
Quality resistance: quality: erucic acid content is less than 1%, glucosinolate content is less than 30 micromol/g, and oil content is about 40%.
Resistance: strong lodging resistance, resistance to sclerotia and strong viral disease.
Cultivation points:
Seedlings: Transplanted rapeseeds are sown in late September. The sowing volume per acre is 0.5 kg, and paclobutrazol or azotoxazole is used to cultivate old strong pods. Age of 40 to 45 days. Live rape can be sowed before September 25, with a seed volume of about 3.5 kilograms.
Density: Transplanted rapeseed was transplanted in early November and planted at a density of 8000 plants per acre. The density of live rapeseed was about 25,000 plants per acre.
Fertilization: The total amount of fertilizer is 15 kg of pure nitrogen, 8 kg of phosphorus pentoxide and 5 kg of potassium dioxide. The application of boron fertilizer during transplanting has a certain effect on yield increase. Principles of fertilization: Reapply basal fertilizer or with root fertilizer, increase application of phosphorus and potassium fertilizer, early application of Miaofei and wax fertilizer, promote Miao Dong Zhuang; control of moss fertilizer, stable long; skillfully apply flower keratin, prevent premature aging live and cooked. Pre-spring and post-spring use fertilizer ratio of 7:3.
Prevention and control of pests: control of aphids, cabbage caterpillars, in particular, to strengthen the comprehensive control of Sclerotinia.