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- Title
4种植物生长调节剂对棉花生长发育、光合特性及产量的影响.
- Authors
金嵘; 李进; 梁晶; 周小云; 张军高; 张雪颖; 曾筱凡; 李珊珊; 高文伟; 雷斌
- Abstract
【Objective】 This experiment was conducted to study and evaluate the effects of NAA-Na, 6-BA, EBR and ABA on cotton growth, leaf photosynthetic characteristics and yield. 【Methods】 NAA-Na (10.0 mg/L), 6-BA (2.0 mg/L), EBR (0.2 mg/L) and ABA (0.5 mg/L) were sprayed when cotton seedlings grew to two-leaf and four-leaf stage, plant height, stem diameter, leaf number, bud number, SPAD value, photosynthetic parameters, were detemined during the seedling period,yield and its components were determined during the harvest period. 【Results】 After spraying the four plant growth regulators, the daily average growth of plant height, stem diameter, leaf number and bud number in each treatment were 0.96-2.78 cm/d, 0.06-0.44 mm/d, 0.15-0.58 slices/d and 0.14-0.86 pieces/d, respectively, which were higher than that in the control treatment; SPAD value, net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) of leaves were respectively increased by 8.02%-10.99%, 8.95%-16.13%, 93.14%-110.17% and 6.58%-19.44% compared with CK at 5 d. Spraying plant growth regulators had no significant differences on the number of harvested cotton plants and boll weight, while compared with CK, the boll number and seed cotton yield per plant were increased by 0.53%-7.54% and 0.73%-9.39%, respectively. EBR treatment was superior to NAA-NA, 6-BA and ABA treatment in promoting growth and yield of cotton. 【Conclusion】 The tested four plant growth regulators could promote the transformation of vegetative growth to reproductive growth, increase the SPAD value and photosynthetic characteristics of cotton leaves, and increase the seed cotton yield by increasing the boll number per plant. EBR treatment was superior to other plant growth regulators.
- Publication
Xinjiang Agricultural Sciences, 2021, Vol 58, Issue 11, p2035
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2021.11.008