【摘要】 研究施用生物炭对新疆连作棉田棉花产量、品质和抗病性的影响，为缓解新疆棉田连作障碍及找到生物炭最佳的施用浓度提供科学依据和理论指导。在不同连作年限（5、10、20、30 a）施用不同浓度生物炭（0、10、20 t/hm~2）条件下，探讨连作年限和生物炭施用浓度对棉花农艺性状、产量、纤维品质和抗病性的影响。结果表明，施用20 t/hm~2有效提高了连作棉田棉花的农艺性状，与CK相比，不同连作年限果枝节位、始节位高度、株高、果枝台数和单株结铃数分别提高1.8%～6.5%、3.7%～11.8%、2.4%～5.4%、2.7%～7.6%和4.6%～9.4%,20 t/hm~2生物炭处理对产量的促进作用最大，子棉和皮棉产量分别提高5.28%～15.28%和6.39%～14.45%。生物炭处理与CK相比，纤维长度提高0.32%～5.78%，断裂比强提高1.89%～4.36%，马克隆值降低2.13%～8.70%，整齐度提高0.47%～1.54%。生物炭处理可以有效缓解长期连作棉田黄萎病的发病率，与CK相比，20 t/hm~2生物炭处理可以使黄萎病发病率降低6.38%～25.34%。更多还原

【Abstract】 To study the effects of biochar application on cotton yield,quality and disease resistance in continuous crop cotton fields in Xinjiang,in order to provide scientific basis and theoretical guidance for alleviating continuous crop barriers and finding the best application concentration of biochar in cotton fields in Xinjiang. The effects of succession years and biochar application concentrations on cotton agronomic traits,yield,fiber quality and disease resistance were investigated under different succession years(5,10,20 and30 a)with different concentrations(0,10 and 20 t/hm~2)of biochar application. The results showed that the application of 20 t/hm~2effectively improved the agronomic traits of cotton in the continuous crop fields,compared with CK treatment,and the fruiting branch node,initial node height,plant height,number of fruiting branch stations and number of boll sets per plant increased by 1.8% to6.5%,3.7% to 11.8%,2.4% to 5.4%,2.7% to 7.6% and 4.6% to 9.4% respectively,in different continuous crop years,the 20 t/hm~2biochar treatment had the greatest yield promotion effect,increasing seed and lint cotton yields by 5.28 to 15.28% and 6.39% to14.45%,respectively. Biochar treatment increased fiber length by 0.32%～5.78%,break strength by 1.89%～4.36%,macronaire value by 2.13%～8.70% and neatness by 0.47%～1.54% compared with CK treatment. Biochar treatment could effectively alleviate the incidence of yellow wilt disease in long-term continuous cotton fields,and 20 t/hm~2biochar treatment could reduce the incidence of yellow wilt disease by 6.38% to 25.34% compared with CK treatment.更多还原