Golden Nonghua Cotton Variety-- Yubaoza 4
Approval number: Yu Shimian 2006011
Characteristics: spring cotton hybrid varieties. (central Henan) the whole growth period is 131 days, with good growth in seedling stage and steady growth in later stage. The plant height is 104.9 cm, the plant is tower-shaped, the plant shape is loose, the leaves are medium size, the leaves are dark, the bolls are strong, the bolls are oval and medium on the large side. The average number of fruit branches per plant is 17.2, bolls per plant is 28, boll weight per boll is 6.2g, lint percentage is 40.5%, seed index is 11.1g, pre-frost flower rate is more than 90%, floss is smooth, fiber is white, cashmere length 29.3mm. High resistance to Fusarium wilt, Verticillium wilt and cotton bollworm.
Yield performance: participated in the regional test and production test of spring sowing hybrid cotton in Henan Province from 2004 to 2005. the average yield of seed cotton and lint was 10% and 7% higher than that of the control variety Yuza 35. In 2006, 3.5 mu of seed cotton was planted in Yanjin, Henan Province, with an average yield of 388 kg per mu. In 2007, more demonstrations were arranged in Hami, Korla, Aksu and other places. At present, the field performance is obviously better than other varieties.
Suitable area: suitable for spring sowing or wheat transplanting in Huang-Huai cotton area and cotton planting in southern Xinjiang.
Cultivation points: about 1500 seedlings per mu in Huang-Huai cotton area and 12000 seedlings per mu in southern Xinjiang.
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Matters needing attention in Regional Test of Cotton varieties (Lines)
The regional comparison test of cotton varieties (lines) is to compare the newly introduced local varieties (lines) with the main local varieties to identify their characteristics of early maturity (growth period), high quality, high yield and resistance to diseases and insect pests, as well as economic characters and fiber quality. The main purpose of this paper is to identify the performance of the tested varieties (lines) in each cotton area, so as to provide a scientific basis for the selection of excellent varieties in each cotton area. First, the selected experimental site should be representative and consistent. It is required that the land is flat, the fertility is medium and uniform, the previous crop is consistent, the irrigation and drainage is convenient, the location of the experimental plot is suitable, and the light is light.
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Key points of Cotton yield formation period Management
The light and heat conditions in the early part of this year are favorable for the growth of cotton, but the recent low temperature and light, overcast and rainy weather are extremely disadvantageous to the growth of cotton, and the shedding of buds and bolls increases obviously. At present, it is a critical period for the formation of cotton yield. in order to obtain high cotton yield, the following management measures should be strengthened: first, to apply topping fertilizer and foliar spraying fertilizer for cotton fields with more bolls and premature senescence, urea 5-7.5 kg per 667 square meters, foliar fertilizer can also be applied in combination with pest control. Second, reasonable pruning and chemical control due to recent Rain Water
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