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| 氮肥对棉花应用增效缩节胺封顶效果的影响 |
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韩焕勇1,2, 王方永2, 陈兵2, 李保成2, 张旺锋3, 田晓莉1, 李召虎1
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1.中国农业大学 植物生长调节剂教育部工程研究中心, 北京 100193;2.新疆农垦科学院 棉花研究所, 新疆 石河子 832003;3.石河子大学 农学院, 新疆 石河子 832000
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| 摘要: |
| 为明确棉花施N对DPC+（1，1-二甲基哌啶鎓氯化物；1，1-Dimethyl-piperidinium chloride）化学封顶效应的影响，以新陆早53号为材料，于2013—2014年在新疆石河子地区进行田间试验。研究结果表明，施N量对棉花株高和果枝数影响不大，但显著影响棉花的产量。中N（300 kg/hm2）处理子棉产量最高，较低N（150 kg/hm2）和高N（450 kg/hm2）分别增加23.5%和6.6%。棉花株高和果枝台数随DPC+剂量的增加而下降，不同剂量DPC+的株高较CK增加4.8~11.6 cm，果枝数增加3.8~4.6台。中剂量（750 mL/hm2）DPC+处理的平均产量与CK基本持平，高剂量（1 050 mL/hm2）略有降低，低剂量（450 mL/hm2）的较CK降低6%~9%。中N中剂量DPC+的产量是所有处理中（包括CK）最高的，主要原因在于干物质向经济器官的分配较多。低N和高N量下，分别以低剂量DPC+和高剂量DPC+的产量相对较高。施N量和DPC+对棉花纤维品质无显著影响。棉花生产中需要根据N肥用量确定适宜的DPC+剂量进行化学封顶。 |
| 关键词: 棉花 施氮量 增效DPC(DPC+) 化学封顶 产量 |
| DOI：10.11841/j.issn.1007-4333.2017.02.002 |
| 分类号: |
| 基金项目:国家科技支撑计划（2014BAD09B03）；新疆农垦科学院引导计划（64YYD201401）；现代农业产业技术体系（CARS-18-18） |
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| Effect of nitrogen fertilizer on plant growth and yield formation of cotton applied with fortified DPC |
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HAN Huanyong1,2, WANG Fangyong2, CHEN Bing2, LI Baocheng2, ZHANG Wangfeng3, TIAN Xiaoli1, LI Zhaohu1
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1.Engineering Research Center of Plant Growth Regulator, Ministry of Education, China Agricultural University, Beijing 100193 China;2.Cotton Institute, Xinjiang Academy Agricultural and Reclamation Science, Shihezi 832003, China;3.College of Agriculture, Shihezi University, Shihezi 832000, China
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| Abstract: |
| In order to investigate the effect of N rate on the responses of cotton growth as well as yield and fiber quality to DPC+,field experiments were conducted in 2013 and 2014 in Shehezi,Xinjiang Uygur Autonomous Region,using a split-plot design with the N rate as main plot and the DPC+ dose as the subplot.Cotton variety Xinluzao 53 was used as material in this study,and manual topping was as control for DPC+ application.The results indicated that the N rate didn't affect plant height (PH) and the number of sympodias (SN),but significantly affected cotton yield.Middle N rate (300 kg/hm2) produced the greatest yield,which was 23.5% and 6.6% greater than that of low N rate (150 kg/hm2) and high N rate (450 kg/hm2),respectively.With the increase of DPC+ dose,the PH and SN decreased.Compared to control,the PH of DPC+ application was 4.8-11.6 cm higher,and the SN was 3.8-4.6 more.The mean yield at middle dose of DPC+ (750 mL/hm2) was similar to that of control,and slightly lower than that of control at high dose of DPC+ (1 050 mL/hm2),but reduced by 6%-9% at low dose of DPC+ (450 mL/hm2).The yield of middle dose of DPC+ under middle N rate showed the highest yield among all treatments (including control),which resulted from appropriate dry mass accumulation and greater distribution ratio to reproductive part.The low- and high- dose of DPC+ produced the greater yield than other treatments including conttrol at low- and high N rate,respectively.The N rate and DPC+ dose didn't affect fiber quality.Taken together,we suggest that the N rate applied should be carefully considered while choosing application of optimum DPC+ dose to replace the manual topping in cotton production. |
| Key words: cotton nitrogen fortified DPC no topping yield |
