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灌排模式對(duì)稻田作物水足跡的影響
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國(guó)家自然科學(xué)基金項(xiàng)目(51979074)、中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(B200202095、2019B81414)和江蘇省研究生科研與實(shí)踐創(chuàng)新計(jì)劃項(xiàng)目(SJKY19_0524)


Effects of Irrigation and Drainage Modes on Crop Water Footprint in Rice Production
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    設(shè)置淺水勤灌(FSI)、淺濕灌溉(WSI)、控制灌溉(CI)和蓄水控灌(RC-CI)4種灌排模式,于2017—2018年進(jìn)行了桶栽觀測(cè)試驗(yàn),利用作物水足跡計(jì)算方法量化藍(lán)、綠、灰水足跡,分析灌排模式對(duì)水稻水足跡及其組成的影〖JP2〗響。結(jié)果表明:在不同灌排模式下,水稻作物水足跡、組成及其效率均存在差異。所有處理水足跡的范圍為846.3~1132.3mm,RC-CI處理水足跡最小,而FSI最大。FSI、WSI、CI、RC-CI作物生產(chǎn)水足跡年均值分別為1.26、1.18、1.06、1.08m3/kg。在水足跡組成方面,藍(lán)、綠、灰水足跡比例分別為10.9%~22.3%、28.8%~44.1%和39.4%~55.0%。FSI處理藍(lán)水比例最大,RC-CI處理綠水比例占有優(yōu)勢(shì)。蓄水控灌降低了水稻作物水足跡,其用水結(jié)構(gòu)更為合理,減小了機(jī)會(huì)成本,能夠較好地實(shí)現(xiàn)節(jié)水減排。本研究可為選擇水稻高效灌排模式和農(nóng)業(yè)節(jié)水策略制定提供參考。

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    Water footprint quantifies water resource consumption and nitrogen emission simultaneously during crop growth and provides a new method for irrigation and drainage modes evaluation in paddy rice field. Experiments were conducted during two consecutive years (2017 and 2018). Paddy rice was grown under four irrigation and drainage modes in microplots at the same location in each year. These treatments were frequent and shallow irrigation (FSI), wet-shallow irrigation (WSI), controlled irrigation (CI) and rain-catching and controlled irrigation (RC-CI). The general objectives were to calculate and analyze crop water footprint indicators, evaluate effect of modes on these indicators and choose efficient mode. The effect of the treatments on blue water footprint, green water footprint, grey water footprint, crop water footprint (WF) and its composition, and water footprint of production (WFP) was evaluated. These indicators were apparently different. WF of all treatments was within 846.3~1132.3mm. WF of RC-CI treatment was the smallest while annual WF of FSI treatment was the largest. The average annual WFP were 1.26m3/kg (FSI), 1.18m3/kg (WSI), 1.08m3/kg (RC-CI) and 1.06 m3/kg(CI), respectively. The percentage of blue, green and grey WF were 10.9%~22.3%, 28.8%~44.1% and 39.4%~55.0%, respectively. The percentage of blue WF was the largest for FSI treatment and that of green WF was superior for RC-CI treatment. RC-CI treatment reduced WF and opportunity cost. Besides, WFP of CI treatment and RC-CI treatment was close and relatively small. On the whole, RC-CI should be adopted to save water and reduce pollution caused by nitrogen emission. The research result can provide references for the selection of efficient rice irrigation and drainage mode and the formulation of agricultural water-saving strategies.

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吳夢(mèng)洋,操信春,任杰.灌排模式對(duì)稻田作物水足跡的影響[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2021,52(1):256-262. WU Mengyang, CAO Xinchun, REN Jie. Effects of Irrigation and Drainage Modes on Crop Water Footprint in Rice Production[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(1):256-262.

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  • 收稿日期:2020-03-31
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  • 在線發(fā)布日期: 2021-01-10
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