新疆农业科学2017，Vol.54Issue(11)：1972-1982,11.DOI:10.6048/j.issn.1001-4330.2017.11.002
滴灌模式和种植密度对棉花叶片衰老特性的影响
Effect of Drip Irrigation Pattern and Planting Density on Leaf Senescence of Cotton
摘要
Abstract
[Objective] To explore the regulation of drip irrigation pattern and planting density on the cotton yield-forming stage of leaf senescence and dry matter production and provide evidence for regulation drip irrigation of cotton premature senescence and increase yield.[Method] Used Xinluzao 45 as the experimental material,field experiments were conducted with two drip irrigation patterns (I1,600 nm and I2,450 nm) and three levels of planting densities (Dt,12 × 104 plant/hm2;24 × 104 plant/hm2;36 × 104 plant/hm2).The leaf area index,chlorophyll content,protective enzyme of cotton and dry matter accumulation were measured.[Result] Compared with the conventional drip irrigation,limited drip irrigation treatment of leaf area index (LAI) decreased by 17.8％,but superoxide dismutase activity (SOD) and peroxidase activity (POD) increased by 8.4％,44.7％,12.9％,respectively.There was not significant difference between the two treatments in dry matter accumulation.With the increase of planting density,LAI,dry matter accumulation as well soluble protein (Pr),malondialdehyde (MDA) and chlorophyll content at full boll stage showed a trend of increase gradually.Correlation analysis showed that the SOD was very significant positive correlation between LAI and (r =0.485 * *),LAI and reproductive organs dry and total dry matter were extremely significant positive correlation (r =0.721 * *,r =0.721 * *).Under limited drip irrigation condition,the high density treatment enhanced the leaves chlorophyll content,SOD activity,POD activity and Pr content after full boll stage,and extended LAI maximum duration,which finally achieved the highest total and reproductive dry matter accumulation.[Conclusion]Therefore,under the condition of limited drip irrigation a modest increase in planting density can be used as effective control measures to delay the cotton senescence and increase the production in arid areas.关键词
棉花/滴灌方式/种植密度/叶片衰老/物质生产Key words
cotton/drip irrigation pattern/planting density/leaf senescence/dry matter production分类
农业科技引用本文复制引用
马卉,牛玉萍,夏军,陈宗奎,罗宏海..滴灌模式和种植密度对棉花叶片衰老特性的影响[J].新疆农业科学,2017,54(11):1972-1982,11.基金项目
Doctoral Program of Xinjiang Production and Construction Corps " Physiological regulation and control technology strategy for efficient water use in cotton under mulch drip irrigation based on water deficit compensation effect" (2014BB009) and Fok Ying Tung Education Foundation "Photosynthetic physiological compensation mechanism research for high yield cotton under limited irrigation in arid area" (15030) （2014BB009）
新疆兵团博士资金专项“基于缺水补偿效应的膜下滴灌棉花高效用水生理调控技术研究”(2014BB009) （2014BB009）
霍英东教育基金会“干旱区有限灌溉棉花高产的光合生理补偿机制研究”(151030) （151030）
