A New Cotton Variety "Yuncai n3738"
First, the characteristics. The cotton fiber of this strain is natural green, the plant growth is steady, the leaf is medium size, the leaf warp is obvious, the plant tower type, the growth period is 122 days. The boll is prominent, precocious but not senile, and the yield is good. The boll is large and oval, with a boll weight of 4.1 grams and a lint percentage of 28.7%. It has wide adaptability, good yield stability and high yield potential.
Second, fiber quality and disease resistance. Determined by the Cotton Fiber quality testing Center of the Ministry of Agriculture, 2.5% span 27.6 mm, micronaire value 2.68, compared with the 2005 * * autonomous region approved green cotton "Xincai 7" fiber quality has been greatly improved, especially in cotton fiber strength.
Identified by the plant protection room of Shanxi Cotton Institute in 2006, Fusarium wilt index was 7.5%, Verticillium wilt index was 40.5%, and the field showed resistance to Fusarium wilt and not to Verticillium wilt. It has good tolerance to cotton aphid, but it is not insect-resistant cotton.
III. Key points of cultivation
1. It is appropriate to concentrate on continuous planting, and the planting distance with other cotton varieties should be kept at more than 500 meters to prevent hybridization and mixing.
2. The individual bearing of this variety is smaller than that of spring-sown white cotton, so the planting density should be 5-7% higher than that of white cotton, and the general density per mu should be 3000-4500 plants.
3. Insect pests should be controlled in time when they are found in the flower bud stage, and weeding and chemical control should be done in rainy years.
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New Cotton Variety-gk99-1
The characteristic growth period is 129 days, which belongs to the mid-early maturing upland cotton variety. The plant height is 90.7 cm, the fruit branch node position is about 6.4, the plant tower type, the light transmittance is good, the boll setting is strong, the stem and leaf is hairy, the leaf is medium size, the notch is deep, the leaf is green, the bell is oval, the boll is smooth and concentrated, the weight of single boll is 5.7g, and the seed finger is 10.8g. Cultivation techniques to increase the application of base fertilizer, early heavy application of flower and boll fertilizer, supplementary application of top fertilizer. Flower and boll fertilizer should be re-applied to the early flowering stage, usually 15-20 kg urea per mu in the first ten days of July. Around July twenty _ fifth
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A New Cotton Variety "Tianning No.2" with High yield and Disease Resistance
1. The characteristic growth period is 130d, the plant is tower-shaped, the plant height is 100cm, the fruit branch nodes are 6-8, and the leaves are light green. The boll is oval, strong and concentrated in boll setting, and less resistant to drought and waterlogging. The boll weight is 5.5 g-6 g, with an average of 30-35 bolls per plant, with a maximum of 90. Smooth and white, easy to pick, lint percentage 38-40%, seed index 10g, pre-frost cotton 90%. High resistance to Fusarium wilt, disease index 2.3, high resistance to Verticillium wilt, disease index 22.9, precocious but not premature senility. Adapt to the Huang-Huai River Basin
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