关键词: 保水剂, 保水剂, 凝胶, 核桃, 土壤酶活性, 微生物数量

Abstract: Aiming at the common problems in cotton production, such as serious Fusarium wilt and Verticillium wilt, low fiber strength, too high micronaire and lack of earlier maturity varieties, different genetic background materials were collected and good comprehensive characters germplasms were screened as the parent materials. Then, hybridization was conducted between selected parent materials to cultivate progeny materials with multiple excellent target traits and through many generations’ south-reproduction and north-selection, evaluation of disease resistance in the whole growth period and different environmental adapting identification, the high quality, early maturity, disease-resistance and high yield ‘Ji863’ was cultivated. In 2006, the variety attended the Mid-South of Hebei Province spring sowing cotton regional trial. Then it was approved by Hebei Breeding Examination and Approve Committee and was entitled ‘Ji863’ in 2010. ‘Ji863’ fiber quality conformed to the law of the People's Republic of China agriculture industry standard Ⅱ type and quality cotton AA grade. Compared with other conventional spring cotton varieties approved in 2010 and in recent five years, ‘Ji863’ had better fiber qualities and earlier maturity, such as higher uniformity index, higher fiber strength, higher reflectivity and more suitable spinning evenness index. ‘Ji863’ was suitable for the production needs and the best comprehensive properties of cotton variety. ‘Ji863’ was an excellent germplasm resource which could be used to breed more new good varieties.