| 种植密度和施氮量对等行距机采棉根系形态指标及产量的影响 |
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| 引用本文： | 徐高羽,林涛,邵亚杰,张昊,汤秋香. 种植密度和施氮量对等行距机采棉根系形态指标及产量的影响[J]. 新疆农业科学, 2022, 59(2): 302-309. DOI: 10.6048/j.issn.1001-4330.2022.02.005 |
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| 作者姓名： | 徐高羽 林涛 邵亚杰 张昊 汤秋香 |
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| 作者单位： | 1.新疆农业大学农学院, 乌鲁木齐 8300522.新疆农业科学院经济作物研究所, 乌鲁木齐 8300913.农业部荒漠绿洲作物生理生态与耕作重点实验室,乌鲁木齐 830091 |
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| 基金项目： | 国家重点研发项目(2020YFD1001005);新疆农业科学院科技创新重点培育项目(xjnky-2020003);新疆农业科学院农业科技创新平台能力提升建设专项-农业农村部荒漠绿洲作物生理生态与耕作重点实验室开放课题(25107020-202001);新疆维吾尔自治区天山英才人才培养项目和新疆维吾尔自治区重大科技专项(2020A01002-4) |
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| 摘 要： | [目的]研究不同种植密度和氮肥施用量对76 cm等行距机采棉根系形态指标及产量的影响.[方法]采用裂区设计,分别为主区密度(M1:22.5×104株/hm2、M2:18×104株/hm2、M3:13.5×104株/hm2)和副区氮肥(N1:0 kg/hm2、N2:300 kg/hm2、N3:600 kg/hm2),分析...
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| 关 键 词： | 机采棉 等行距 种植密度 施氮量 |
| 收稿时间： | 2021-02-10 |
Effects of Nitrogen Fertilizer and Density on Dry Matter Accumulation,Root Growth and Yield of Cotton with Equal Row Spacing |
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| XU Gaoyu,LIN Tao,SHAO Yajie,ZHANG Hao,TANG Qiuxiang. Effects of Nitrogen Fertilizer and Density on Dry Matter Accumulation,Root Growth and Yield of Cotton with Equal Row Spacing[J]. Xinjiang Agricultural Sciences, 2022, 59(2): 302-309. DOI: 10.6048/j.issn.1001-4330.2022.02.005 |
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| Authors: | XU Gaoyu LIN Tao SHAO Yajie ZHANG Hao TANG Qiuxiang |
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| Affiliation: | 1. Research Center of Cotton Engineering, MOARA / College of Agronomy,Xinjiang Agricultural University, Urumqi 830052,China2. Institute of Economical Crops,Xinjiang Academy of Agricultural Sciences,Urumqi 830091,China3. Key Laboratory of Crop Ecophysiology and Farming System in Desert Oasis Region,MOARA,Urumqi 830091, China |
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| Abstract: | 【Objective】 To study the effects of different planting densities and nitrogen application amounts on the morphological index and yield of 76 cm equal-spaced cotton roots. 【Method】 The split-zone design was adopted, which was divided into the main zone density (M1: 225,000 plants/hm2, M2: 180,000 plants/hm2, M3: 135,000 plants/hm2) and the sub-zone nitrogen fertilizer (N1: 0 kg/hm2, N2: 300 kg/hm2, N3: 600 kg/hm2). 【Result】 The results showed that the yield of seed cotton increased significantly by 10.6%-14.5% with nitrogen application rate of 300 kg/hm2.However, when the nitrogen application rate was too high (600 kg/hm2), the dry matter accumulation would decrease.Appropriate increase of planting densities and nitrogen application rates could promote cotton root weight density, root length density, root surface area density, root volume and average root diameter.The root mass and root volume of the highest treatment M1N2 (225,000 plants/hm2,300 kg/hm2) were 34.3% and 50.1% higher than those of the lowest treatment M3N3 (135,000 plants/hm2,600 kg/hm2), respectively, and the average root diameter and average root surface area were 36.1% and 56.2% higher than those of the lowest treatment M3N3 (135,000 plants/hm2· 300kg/hm2), respectively.The root length density was the highest under M1N3 (225,000 plants/hm2, 600 kg/hm2), which was 20.8% higher than that under the lowest treatment.The final best combination with high yield was M2M2 (180,000 plants/hm2,300 kg/hm2), which was 18.5% higher than that of the lowest combination M2N3 (180,000 plants/hm2,600 kg/hm2). 【Conclusion】 It can be seen that the planting density of 180,000 plants/hm2 and the nitrogen application rate (pure nitrogen) of 600 kg/hm2 can promote the yield improvement and root formation in the machine-picked cotton planting mode with an equal row spacing of 76 cm in southern Xinjiang. |
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| Keywords: | machine-picked cotton equal row spacing planting density nitrogen application rate |
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