Correlation analysis of cotton yield and growth period change in Alar reclamation area of southern Xinjiang
In order to explore the influence of dynamic changes of cotton growth period on yield fluctuation in Alar reclamation area of southern Xinjiang,the lint yield data and cotton growth period data from 1990 to 2020 in Alar reclamation area of southern Xinjiang were selected,and the relationship between cotton yield fluctuation and dynamic changes of growth period in Alar reclamation area of southern Xinjiang from 1990 to 2020 was analyzed by Mann-Kendall nonparametric mutation test,quadratic exponential smoothing method,correlation analysis and dominant analysis method.The results indicated that from 1990 to 2020 in the Alar reclamation area of southern Xinjiang,the actual yield and trend yield of cotton both exhibited an increasing trend,with changes of 44.74 kg·hm-2·a-1 and 46.36 kg·hm-2·a-1,respectively,while the climate yield displayed a decreasing trend,changing by 1.61 kg·hm-2·a-1.From 1990 to 2001,the growth rate of the cotton trend yield and the growth rate of the climatic yield were both higher than those from 2001 to 2020.From 1990 to 2020,the increase of cotton actual yield and trend yield in Alar reclamation area of southern Xinjiang was mainly affected by the shortening of flowering-opening period,with a contribution rate of 100%.The decrease of cotton climatic yield was mainly affected by the extension of emergence-budding period,with a contribution rate of 76.48%.From 1990 to 2001 and 2002 to 2020 in the aral reclamation area of southern Xinjiang,the increase in actual cotton yield was primarily due to the shortening of the flowering-opening period,with a contribution rate of 100%for both periods.The decrease in climate yield was mainly influenced by the lengthening of the emergence-budding period and the shortening of the budding-flowering period during the same periods,with their respective contribution rates being 52.91%and 54.45%.Shortening the flowering-opening period,emergence-squaring period,and lengthening the budding-flowering period of cotton in the reclamation area are beneficial to the increase of lint yield in the reclamation area.
cotton yieldgrowth periodcorrelationAlar reclamation area of southern Xinjiang
万方数据
维普
