"Huanghuang No.4" is a new yellow-seed rapeseed variety selected by the Chongqing Rapeseed Engineering Technology Research Center of Southwest University. It has the advantages of high yield, good quality, moderate plant height, good plant type, disease resistance, and strong lodging resistance. December 2009 Approved by the National Crop Variety Approval Committee (Validation No.: Guojian Oil 2009025). It is suitable for planting in winter canola production areas in Sichuan, Chongqing, Guizhou, Yunnan and Shaanxi Hanzhong and Ankang.
Characteristic characteristics
The seedlings are semi-vertical, with large leaves, dark green leaves, and 1 or 2 pairs of lobulated leaves. The margins of the leaves are shallowly serrated and have no nicks. The wax powder is thick and the leaves have no bristles. Yellow flowers, large petals, lateral folds. Seed brown. The mature plants were 181.8 cm in height, were evenly branched, and had more than 9.1 effective branches at one time. The number of effective pods per plant was 435.3, the middle fruit type was 19.43 grains per fruit, and the grain weight was 3.61 g. The whole growth period is 222 days. Antibacterial nuclear disease and viral disease, strong resistance. The grain erucic acid content was 0, the glucosinolate content was 27.66 micromol/g cake, and the oil content was 41.46%.
Cultivation techniques
In the upper reaches of the Yangtze River, seedlings are planted from September 5 to September 20 (places at high elevations should be early, and low elevations should be postponed). The seeding rate of the seedbed is 6 kg/ha, and the ratio of seedbeds to fields is 1:5-6. Early seedlings, early set seedlings, diligence treatment of pests and diseases. The seedlings were transplanted for 30 to 35 days, and they were given a “fertility fertilizer†7 days before transplanting. Pesticides were sprayed 1 day before transplanting.