【摘要】 在深松40 cm条件下,设置4、7、10 d/次3个滴灌周期,灌溉总量均为3 600 m~3/hm~2,分析了不同滴灌周期对棉花农艺性状、蕾铃动态分布、干物质积累分配及产量构成的调节效应。结果表明:深松条件下滴灌周期7 d处理有利于提高棉花株高、主茎叶片数、蕾数及铃数,且促进营养器官干物质积累转向生殖器官,提高单株结铃数、单铃重,较4、10 d分别增加8.53%、4.98%、9.31%、8.38%,最终使籽棉产量及水分利用率提高了15.72%、16.50%、17.48%、18.38%。因此,深松40 cm条件下滴灌周期为7 d有利于农艺性状和产量提高。更多还原

【Abstract】 In this study, under the condition of 40 cm subsoiling, 3 drip irrigation cycles(4,7,10 d/time) were set, and the total irrigation amount was 3600 m3/hm2. The regulatory effects of different drip irrigation cycles on agronomic traits of cotton, dynamic distribution of buds and bolles, dry matter accumulation and distribution and yield composition were analyzed. The results showed that under subsoiling condition, the treatment of 7 d drip irrigation cycle was beneficial to improve the cotton plant height, number of main stem leaf, bud number, number of fluid, and could promote the accumulation of dry matter of vegetative organs to reproductive organs, improve the boll number per plant and single boll weight, which were increased by 8.53%, 4.98%, 9.31%, 8.38% than those of the treatment of 4 d and 10 d drip irrigation cycle, respectively, eventually increased the seed cotton yield and water use efficiency by 15.72%, 16.50%, 17.48%, 18.38%. Therefore, the treatment of 7 d drip irrigation cycle under 40 cm subsoiling condition is beneficial to the improvement of agronomic characters and yield.更多还原