Effects of Growth and Yield of Tahe-2 on Different Topping Time Under Ultra-Large and Wide Membrane Conditions
1. Agricultural Development Service Center, the 8th Regiment of the 1st Division of Xinjiang Production and Construction Corps, Alar 843017, China
2. Cotton Institute, Xinjiang Academy Agricultural and Reclamation Science, Shihezi 832003, China
| Abstract: | Topping is a key technical measure in cotton production, which directly affects yield and quality of cotton. Taking the cotton variety Tahe-2, the main cotton variety of the eighth Regiment of the First Division of the Corps, as the research object, three topping time treatments (T1, T2, T3) and one CK treatment were set to analyze the influence of the growth and yield of cotton Tahe-2 on different topping time, so as to determine the appropriate topping time and technology in this region. The results showed that with the delay of topping time, the number of fruit branches increased by 0.97, the height of plant and the height of fruit branches increased in 5.82cm, 2.16cm, respectively; the average length of fruit branches and the average degree of three nodes decreased in 3.88cm, 6.37cm, respectively; and the length of internode first increased and then decreased. The number of bolls in the lower part was the largest, accounting for 44.0%, while that in the middle and upper part was close, accounting for 32.9%, 23.1%, respectively. The number of inner ring bolls was the largest, accounting for 81.33-88.61%. The number of peripheral ring bolls wasrelatively small, accounting for 11.39-18.67%. The overall production showed a trend of first increase and then decrease, and the production of T2 treatment was the highest, reaching 6849.15 kg/hm2, and the yield Tahe 2 peaked around July 1. Therefore, timely and early topping can effectively improve cotton plant type, control apex dominance, promote reproductive growth and rational nutrient distribution, increase boll setting rate and boll weight, so as to achieve early maturity, high yield and stable yield. |
| Keywords: | Topping Time; Tahe 2; Growth and Development; Yield |
| DOI: | 10.57237/j.jaf.2024.02.001 |
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Received: 2 April 2024
Accepted: 18 April 2024
Published Online: 24 April 2024
Funding
| 1. | 新疆维吾尔自治区天山英才-青年科技拔尖人才项目, 国家科技创新-重大项目 (2023ZD04040-5-2) |
| 2. | 国家重点研发计划 (2020YFD1001002-2) |
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