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微孔陶瓷滲灌與地下滴灌土壤水分運(yùn)移特性對(duì)比
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“十二五”國(guó)家科技支撐計(jì)劃項(xiàng)目(2015BAD22B01-02),、國(guó)家自然科學(xué)基金項(xiàng)目(51409221)、西北農(nóng)林科技大學(xué)基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(2014YB061)和石河子大學(xué)高層次人才科研啟動(dòng)資金專項(xiàng)(RCZX201434)


Comparison of Characteristics of Soil Moisture Transfer for Porous Ceramic Infiltration Irrigation and Subsurface Drip Irrigation
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    摘要:

    以微孔陶瓷灌水器為研究對(duì)象,在0m工作水頭下進(jìn)行土壤水分運(yùn)移特性試驗(yàn),,并以10m額定工作水頭下工作的地下滴灌灌水器作為對(duì)照,。通過(guò)對(duì)比分析2種灌溉方式下累計(jì)入滲量,、流量,、濕潤(rùn)體特征和土壤含水率變化,,結(jié)果表明:相同灌溉時(shí)間下微孔陶瓷滲灌的累計(jì)入滲量,、濕潤(rùn)鋒運(yùn)移距離、濕潤(rùn)體截面面積均明顯小于地下滴灌,。微孔陶瓷滲灌的流量隨時(shí)間逐漸減小,,直至接近于零;試驗(yàn)后期,,微孔陶瓷滲灌濕潤(rùn)體內(nèi)整體土壤含水率變化較?。挥捎谖⒖滋沾蓾B灌為無(wú)壓連續(xù)灌溉,,因此在其工作過(guò)程中可為作物提供一個(gè)恒定的水分環(huán)境,。而地下滴灌的流量則會(huì)維持穩(wěn)定,使得土壤含水率一直增大,,停止灌溉后由于土壤水分再分布而減小,。地下滴灌為被動(dòng)恒壓灌溉,因此其灌溉條件下作物生長(zhǎng)的水分環(huán)境處于干濕交替的循環(huán)變化狀態(tài),。

    Abstract:

    Aiming to have insights into characteristics of soil moisture transfer of porous ceramic infiltration irrigation, soil moisture transfer experiment was conducted by using porous ceramic emitter, of which the working head was 0m, meanwhile, subsurface drip irrigation tape with working head of 10m was used to carry out a control test. The comparisons of cumulative infiltration, emitter discharge, wetting soil characteristic and change of soil water content of two different irrigation methods were made. The results indicated that when the irrigation time was the same, the cumulative infiltration, wetting front and wetting zone sectional area of porous ceramic infiltration irrigation were less than those of subsurface drip irrigation. The discharge of porous ceramic infiltration irrigation was decreased gradually with the increase of time, which was closed to 0L/h at last, in contrast, the discharge of subsurface drip irrigation was relatively stable. In the late experimental period, soil water contents in the wetting zone of porous ceramic infiltration irrigation were changed slightly. While water contents of subsurface irrigation were increased continuously, and then they got decreased after stopping irrigation because of soil water redistribution. Because porous ceramic infiltration irrigation was a continuous irrigation method, thus it could provide a constant soil moisture environment for crops. But subsurface drip irrigation was a passive and intermittent irrigation method, and soil moisture environment for crops was alternate drying-wetting. The present study provided valuable information for the popularization and application of porous ceramic infiltration irrigation.

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蔡耀輝,吳普特,張林,朱德蘭,任改萍,陳俊英.微孔陶瓷滲灌與地下滴灌土壤水分運(yùn)移特性對(duì)比[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2017,48(4):242-249. CAI Yaohui, WU Pute, ZHANG Lin, ZHU Delan, REN Gaiping, CHEN Junying. Comparison of Characteristics of Soil Moisture Transfer for Porous Ceramic Infiltration Irrigation and Subsurface Drip Irrigation[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(4):242-249.

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  • 收稿日期:2016-08-05
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  • 在線發(fā)布日期: 2017-04-10
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