干湿交替灌溉下水氮耦合对沸石处理稻田产量和水氮利用的影响
为了明确斜发沸石在干湿交替稻田中的应用潜力,运用离心机法测定不同斜发沸石处理下稻田土壤水分特征曲线,分析了斜发沸石对土壤持水性能的影响;运用自动遮雨棚蒸渗仪进行了灌溉-施氮-沸石的综合水稻栽培试验,明确了斜发沸石和氮肥对干湿交替稻田阳离子交换量、产量、水氮利用率及稻米蛋白质含量的影响及机理。结果表明:稻田土壤基质势在-35~0 k Pa范围内,增施斜发沸石可明显提高土壤持水性能,改善土壤水分状况,在持续淹灌和干湿交替灌溉条件下均能提高水分生产率,且后者更为明显;增施斜发沸石可增强土壤阳离子交换量,从而提高保肥能力和氮肥利用率,尤其是10~15 t/hm2的斜发沸石同105 kg/hm2的氮肥混...
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Published in | 农业工程学报 Vol. 32; no. 22; pp. 154 - 162 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
沈阳农业大学水利学院,沈阳,110866%东港市灌溉新技术试验站,东港,118300
2016
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Subjects | |
Online Access | Get full text |
ISSN | 1002-6819 |
DOI | 10.11975/j.issn.1002-6819.2016.22.021 |
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Abstract | 为了明确斜发沸石在干湿交替稻田中的应用潜力,运用离心机法测定不同斜发沸石处理下稻田土壤水分特征曲线,分析了斜发沸石对土壤持水性能的影响;运用自动遮雨棚蒸渗仪进行了灌溉-施氮-沸石的综合水稻栽培试验,明确了斜发沸石和氮肥对干湿交替稻田阳离子交换量、产量、水氮利用率及稻米蛋白质含量的影响及机理。结果表明:稻田土壤基质势在-35~0 k Pa范围内,增施斜发沸石可明显提高土壤持水性能,改善土壤水分状况,在持续淹灌和干湿交替灌溉条件下均能提高水分生产率,且后者更为明显;增施斜发沸石可增强土壤阳离子交换量,从而提高保肥能力和氮肥利用率,尤其是10~15 t/hm2的斜发沸石同105 kg/hm2的氮肥混施可显著提高氮肥农艺利用率和稻米蛋白质含量;增施斜发沸石可增产4.7%~16.8%,且可优化水肥耦合,避免在高氮水平下干湿交替灌溉增产效果低于持续淹灌的现象。与常规施氮的淹灌稻田相比,干湿交替灌溉稻田施用10 t/hm2斜发沸石和105 kg/hm2的氮肥,可减少27.8%的耗水量和33.3%的施氮量,增产10.6%,进而显著提高氮肥利用效率(89.2%)和水分生产率(52.5%),且这些正效应至少可持续2年。 |
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AbstractList | S274.3%S365; 为了明确斜发沸石在干湿交替稻田中的应用潜力,运用离心机法测定不同斜发沸石处理下稻田土壤水分特征曲线,分析了斜发沸石对土壤持水性能的影响;运用自动遮雨棚蒸渗仪进行了灌溉-施氮-沸石的综合水稻栽培试验,明确了斜发沸石和氮肥对干湿交替稻田阳离子交换量、产量、水氮利用率及稻米蛋白质含量的影响及机理。结果表明:稻田土壤基质势在?35~0 kPa范围内,增施斜发沸石可明显提高土壤持水性能,改善土壤水分状况,在持续淹灌和干湿交替灌溉条件下均能提高水分生产率,且后者更为明显;增施斜发沸石可增强土壤阳离子交换量,从而提高保肥能力和氮肥利用率,尤其是10~15 t/hm2的斜发沸石同105 kg/hm2的氮肥混施可显著提高氮肥农艺利用率和稻米蛋白质含量;增施斜发沸石可增产4.7%~16.8%,且可优化水肥耦合,避免在高氮水平下干湿交替灌溉增产效果低于持续淹灌的现象。与常规施氮的淹灌稻田相比,干湿交替灌溉稻田施用10 t/hm2斜发沸石和105 kg/hm2的氮肥,可减少27.8%的耗水量和33.3%的施氮量,增产10.6%,进而显著提高氮肥利用效率(89.2%)和水分生产率(52.5%),且这些正效应至少可持续2年。 为了明确斜发沸石在干湿交替稻田中的应用潜力,运用离心机法测定不同斜发沸石处理下稻田土壤水分特征曲线,分析了斜发沸石对土壤持水性能的影响;运用自动遮雨棚蒸渗仪进行了灌溉-施氮-沸石的综合水稻栽培试验,明确了斜发沸石和氮肥对干湿交替稻田阳离子交换量、产量、水氮利用率及稻米蛋白质含量的影响及机理。结果表明:稻田土壤基质势在-35~0 k Pa范围内,增施斜发沸石可明显提高土壤持水性能,改善土壤水分状况,在持续淹灌和干湿交替灌溉条件下均能提高水分生产率,且后者更为明显;增施斜发沸石可增强土壤阳离子交换量,从而提高保肥能力和氮肥利用率,尤其是10~15 t/hm2的斜发沸石同105 kg/hm2的氮肥混施可显著提高氮肥农艺利用率和稻米蛋白质含量;增施斜发沸石可增产4.7%~16.8%,且可优化水肥耦合,避免在高氮水平下干湿交替灌溉增产效果低于持续淹灌的现象。与常规施氮的淹灌稻田相比,干湿交替灌溉稻田施用10 t/hm2斜发沸石和105 kg/hm2的氮肥,可减少27.8%的耗水量和33.3%的施氮量,增产10.6%,进而显著提高氮肥利用效率(89.2%)和水分生产率(52.5%),且这些正效应至少可持续2年。 |
Abstract_FL | Increasing demand for maintaining yield with reducing environmental and resource costs challenges conventional rice production. Water inputs can be reduced by the use of alternate wetting and drying (AWD) irrigation. And clinoptilolite zeolite (CZ) benefits farmers through decreasing water inputs and N usages in non-irrigated farmland, however, its performance is rarely reported in paddy field, especially under AWD irrigation. In order to clarify the application potential of CZ under AWD irrigation, an experiment was conducted under automatic canopy lysimeters to determine the effects of CZ on rice grain yield and water and nitrogen usage efficiency under different nitrogen application rates and irrigation regimesusing the split-split-split plot design. The experimental site was located at the Donggang Experimental Station of New Irrigation Technology, Dandong, China in 2012 and 2013. A japonica rice, Oryza sativa L. cv. Gangyu 6 was cultivated on a silty loam soil. Years after zeolite application were main plots. Two irrigation regimes, continuous flooding and AWD irrigations, were subplots. N application rates (0, 52.5, 105 and 157.5 kg/hm2N applied as urea) were sub-subplots and CZ application rates (0, 5, 10 and 15 t/hm2CZ) were sub-sub-sub plots. The experiment was repeated in 2013 but no additional CZ was received, and the plots in 2013 experiment were same as 2012 experiment. Dynamics of soil moisture characteristic curves under different rates of zeolite application were also observed through mixing surface soil samples attained from the experimental site with 0, 5, 10 and 15 t/hm2 in the laboratory. Results indicated that paddy field amended with increasing rates of CZ application significantly increased soil water holding capacity, and improved paddy soil moisture status, when the soil moisture status of paddy surface soil was controlled within the range of -35-0 kPa. At the soil matrix potential of -20 kPa, soil application of 5-15 t/hm2 rates of CZ resulted in 3.0%-6.1% higher volumetric soil water content than zero CZ treatment. The increasing of soil water holding capacity resulted in enhanced water productivity in both continuous flooding and AWD irrigations, while the latter was more obvious. Increasing rate of CZ application significantly improved soil cation exchange capacity and nutrient preserving capability, In particular, the application rate of 105 kg/hm2 nitrogen fertilizer application mixed with 10-15 t/hm2 CZ could significantly improve nitrogen utilization efficiency by 76.8%-87.0% while maintaining normal rice yield. Increasing CZ application also increased grain yield by 4.7%-16.8%, and overcome a slight reduction in grain yield under AWD irrigations at the highest nitrogen rate, as compared to continuous flooding irrigation with the same nitrogen rate. In general, AWD irrigation in combination with 10 t/hm2 CZ and105 kg/hm2nitrogen fertilizer application was recommended. This rice production system could benefit farmers through reducing 27.8% irrigation water, 33.3% nitrogen application, while increasing 10.6% rice yield, 89.2% nitrogen use efficiency and 52.5% water productivity and these positive effects could last at least 2 years. The proposed production system was also expected to be an available strategy for ecological agriculture for arid and semi-arid area which maintains yield with lower environmental and resource costs by enhancing soil water holding capacity and improving nutrient preserving capability in paddy field due to CZ application. |
Author | 陈涛涛 孙德环 张旭东 吴奇 郑俊林 迟道才 |
AuthorAffiliation | 沈阳农业大学水利学院,沈阳110866 东港市灌溉新技术试验站,东港118300 |
AuthorAffiliation_xml | – name: 沈阳农业大学水利学院,沈阳,110866%东港市灌溉新技术试验站,东港,118300 |
Author_FL | Chen Taotao Chi Daocai Wu Qi Zhang Xudong Sun Dehuan Zheng Junlin |
Author_FL_xml | – sequence: 1 fullname: Chen Taotao – sequence: 2 fullname: Sun Dehuan – sequence: 3 fullname: Zhang Xudong – sequence: 4 fullname: Wu Qi – sequence: 5 fullname: Zheng Junlin – sequence: 6 fullname: Chi Daocai |
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Keywords | soil water holding capacity cation exchange capacity nitrogen alternate wetting and drying 水稻 rice 氮 zeolite 灌溉 irrigation 土壤持水率 沸石 阳离子交换量 water productivity 水分生产率 干湿交替 |
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Notes | Chen Taotao1, Sun Dehuan2, Zhang Xudong1, Wu Qi1, Zheng Junlin1, Chi Daocai1 ( 1. College of Water Resources, Shenyang Agricultural University, Shenyang 110866, China; 2. Donggang Experimental Station of New Irrigation Technology, Donggang 118300, China) 11-2047/S zeolite; nitrogen; irrigation; rice; alternate wetting and drying; water productivity; cation exchange capacity; soilwater holding capacity Increasing demand for maintaining yield with reducing environmental and resource costs challenges conventional rice production. Water inputs can be reduced by the use of alternate wetting and drying (AWD) irrigation. And clinoptilolite zeolite (CZ) benefits farmers through decreasing water inputs and N usages in non-irrigated farmland, however, its performance is rarely reported in paddy field, especially under AWD irrigation. In order to clarify the application potential of CZ under AWD irrigation, an experiment was conducted under automatic canopy lysimeters to determine the effects of CZ on rice grain yield and |
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SubjectTerms | 土壤持水率 干湿交替 氮 水分生产率 水稻 沸石 灌溉 阳离子交换量 |
Title | 干湿交替灌溉下水氮耦合对沸石处理稻田产量和水氮利用的影响 |
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