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- W2356940732 abstract "【Objective】In order to provide the basis used in developing the highly productive and effective water-saving agriculture in arid area, the regulation of under-mulch-drip irrigation on production and distribution of photosynthetic assimilate and cotton yield under different soil moisture contents were studied in this paper.【Method】 Using water-sensitivity different cultivars Xinluzao 10 and Xinluzao 13, an irrigation experiment was conducted in field. Lower limit of soil relative moisture content in layer of 0-60 cm was controlled at 55%, 70% and 85% of the field capacity. Upper limit was set as field capacity. Leaf gas exchange and isotopic tracer techniques were used to investigate the change of photosynthesis, production and distribution of photosyntheticassimilate and yield during flowering and boll-setting stage under different soil moisture contents. 【Result】 When the lower limit of soil relative moisture content was 55%, leaf photosynthetic rate and photosynthesis products accumulation of aerial part decreased, the speed of export percentage 14C-assimilates accelerated and distribution percentage 14C-assimilates in bud and boll increased. When the lower limit was 70% and 85%, leaf photosynthetic rate and photosynthesis products accumulation of aerial part were enhanced, but the distribution percentage of 14C-assimilates in stem and leaf significantly increased in 85% treatment. So the seed cotton yield in 70% treatment was the highest, 85% treatment was inferior to 70% treatment, 55% treatment was the lowest, however seed cotton yield water use efficiency was 55%70%85%. The different responses to drip irrigation among varieties were great, the seed cotton yield and water use efficiency of Xinluzao 10 were significantly lower than Xinluzao 13 in 55% and 70% treatments, but that of Xinluzao 10 were higher than Xinluzao 13 in 85% treatment.【Conclusion】These results suggest that different soil moisture contents had significant influence on production and distribution of photosynthetic assimilate and seed cotton yield. Lower limit of soil relative moisture content of 70%-85% during flowering and boll-setting stage would work better in achieving high yield. If the lower limit of soil relative moisture content ranges between 55% and 70%, cotton plant could develop the ability of adaptation to improve water use efficiency. It will be of great importance to institute the optimum irrigation schedule according to different responses to soil moisture content among varieties to obtain high yield and high water use efficiency under-mulch-drip irrigation." @default.
- W2356940732 created "2016-06-24" @default.
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- W2356940732 date "2008-01-01" @default.
- W2356940732 modified "2023-09-24" @default.
- W2356940732 title "Regulation of Under-Mulch-Drip Irrigation on Production and Distribution of Photosynthetic Assimilate and Cotton Yield under Different Soil Moisture Contents During Cotton Flowering and Boll-Setting Stage" @default.
- W2356940732 hasPublicationYear "2008" @default.
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