新疆农业科学 ›› 2021, Vol. 58 ›› Issue (11): 1990-1999.DOI: 10.6048/j.issn.1001-4330.2021.11.004
石峰1,2(), 李海江3, 孙孝贵4, 时晓娟1, 郝先哲1, 田雨1, 韩焕勇2()
收稿日期:
2020-11-04
出版日期:
2021-11-20
发布日期:
2021-12-16
通信作者:
韩焕勇
作者简介:
石峰(1996-),男,硕士研究生,研究方向为棉花高产栽培生理,(E-mail) 1398654206@qq.com
基金资助:
SHI Feng1,2(), LI Haijiang3, SUN Xiaogui4, SHI Xiaojuan1, HAO Xianzhe1, TIAN Yu1, HAN Huanyong2()
Received:
2020-11-04
Online:
2021-11-20
Published:
2021-12-16
Correspondence author:
HAN Huanyong
Supported by:
摘要:
【目的】基于缩节胺调控的免打顶研究棉花农艺性状、冠层结构、光分布及产量的变化规律,为棉花轻简化栽培提供依据。【方法】选用对缩节胺相对敏感的品种新陆早67号(P1)、Z901(P2)、Z903(P3)和澳棉sic75(P4)为试验材料,采用缩节胺调控的免打顶方式,以人工打顶为对照(新陆早60号,CK),测定棉花农艺性状、冠层结构、透光率、干物质累积与分配及产量等指标。【结果】与人工打顶相比,免打顶棉花株高、果枝数和叶龄均显著增加,其中P2株高、果枝数增幅均最大,分别达到了45.2%和100%;P3叶龄的增幅较大,为39.4%。P1叶面积指数峰值最大,P2在达到峰值后降幅最小,仅19.6%;P1冠层开度谷值最小,P3在达到谷值后增幅最小;P2叶倾角峰值最大,比CK高3.4%,P3叶倾角峰值最小,仅比CK高0.91%。冠层各部位透光率在生育后期均表现为增加的趋势,以P4上部透光率增幅最大,达到了27.1%,P3增幅最小,仅为10.7%,P2中部透光率增幅最大,达到了28.3%、P4增幅最小,仅为14.6%,P3下部增幅透光率增幅最大,达到了23.9%,P4增幅最小,仅4.0%;P3生殖器官和营养器官干物质量比例最大,达到了2.2∶1,P1次之,为2.1∶1,但单株总干物质量累积增加最大,为81.9 g/株。P1和P3籽棉产量与CK相比差异不显著。【结论】选用对缩节胺敏感的棉花品种新陆早67号和Z903,于出苗、两叶一心、头水前、二水前、7月5日、7月12日前后分别喷施缩节胺(45+30+30+30+120+150)g/hm2,全程调控替代人工打顶,在不显著降低棉花产量的基础上,可降低生产成本46%,增加植棉效益。
中图分类号:
石峰, 李海江, 孙孝贵, 时晓娟, 郝先哲, 田雨, 韩焕勇. 基于缩节胺调控的免打顶棉花群体结构及产量分析[J]. 新疆农业科学, 2021, 58(11): 1990-1999.
SHI Feng, LI Haijiang, SUN Xiaogui, SHI Xiaojuan, HAO Xianzhe, TIAN Yu, HAN Huanyong. Study on Population Structure and Yield of Topping-free Cotton Based on Regulation of DPC[J]. Xinjiang Agricultural Sciences, 2021, 58(11): 1990-1999.
图7 不同处理棉花透光率的动态变化 注:U:冠层上部;M:冠层中部;L:冠层下部
Fig.7 The dynamic changes of light transmittance for different deals of cotton Note: U:Upper canopy layer;M:Middle canopy layer;L:Lower canopy layer
处理 Treatment | 收获株数 Plant numbers (104/hm2) | 单株结铃 Effective Boll per plant (株/个) | 总铃数 Total boll numbers (104/hm2) | 单铃重 Boll weight (g) | 衣分 Lint percentage (%) | 籽棉产量 Seed cotton yield (kg/hm2) |
---|---|---|---|---|---|---|
P1 | 17.8±0.79b | 5.9±0.71a | 111.2±12.40a | 4.8±0.34a | 45±0.01a | 5 295±631.00ab |
P2 | 20.0±0.86ab | 5.1±0.50a | 101.0±7.44a | 4.5±0.30a | 41±0.01b | 4 563±336.49b |
P3 | 21.0±0.42a | 5.0±0.13a | 103.8±2.60a | 4.6±0.23a | 42±0.01b | 4 774±119.56ab |
P4 | 19.5±1.22ab | 6.2±0.45a | 119.8±4.52a | 3.7±0.18b | 41±0.01b | 4 458±168.02b |
CK | 20.1±2.34ab | 5.7±1.07a | 112.6±10.42a | 5.1±0.43a | 45±0.00a | 5 685±526.23a |
表1 不同处理棉花产量及产量构成
Table 1 Effect of different deals on the yield and its components of cotton
处理 Treatment | 收获株数 Plant numbers (104/hm2) | 单株结铃 Effective Boll per plant (株/个) | 总铃数 Total boll numbers (104/hm2) | 单铃重 Boll weight (g) | 衣分 Lint percentage (%) | 籽棉产量 Seed cotton yield (kg/hm2) |
---|---|---|---|---|---|---|
P1 | 17.8±0.79b | 5.9±0.71a | 111.2±12.40a | 4.8±0.34a | 45±0.01a | 5 295±631.00ab |
P2 | 20.0±0.86ab | 5.1±0.50a | 101.0±7.44a | 4.5±0.30a | 41±0.01b | 4 563±336.49b |
P3 | 21.0±0.42a | 5.0±0.13a | 103.8±2.60a | 4.6±0.23a | 42±0.01b | 4 774±119.56ab |
P4 | 19.5±1.22ab | 6.2±0.45a | 119.8±4.52a | 3.7±0.18b | 41±0.01b | 4 458±168.02b |
CK | 20.1±2.34ab | 5.7±1.07a | 112.6±10.42a | 5.1±0.43a | 45±0.00a | 5 685±526.23a |
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