【摘要】：干旱加劇及土壤退化嚴(yán)重,使新型保水劑γ-聚谷氨酸(γ-PGA)的應(yīng)用在農(nóng)田節(jié)水灌溉中開始暫露頭角�；谑覂�(nèi)垂直一維入滲試驗(yàn),在分析了γ-PGA對(duì)土壤水分入滲能力的影響的同時(shí)還對(duì)Philip模型和Green-Ampt入滲模型進(jìn)行對(duì)比分析。結(jié)果表明:與未施加聚谷氨酸的處理(對(duì)照組)相比,隨著γ-PGA施量的增加,累積入滲量和入滲率均呈單調(diào)遞減趨勢(shì);兩個(gè)入滲模型的擬合結(jié)果顯示:Philip公式中,吸滲率呈減小趨勢(shì),Green-Ampt公式中,飽和導(dǎo)水率、飽和導(dǎo)水率與土壤水吸力的乘積都呈減小趨勢(shì),但土壤水吸力無明顯變化。Philip模型與Green-Ampt入滲模型的對(duì)比分析結(jié)果表明:利用模型參數(shù)互推關(guān)系計(jì)算的Philip模型計(jì)算參數(shù)與擬合參數(shù)的一致性較好,而Green-Ampt模型的計(jì)算參數(shù)與擬合參數(shù)的一致性較差;利用Philip模型計(jì)算參數(shù)計(jì)算的累積入滲量與實(shí)測(cè)累積入滲量之間的吻合程度高,均方根誤差小于0.5,而利用Green-Ampt模型計(jì)算參數(shù)計(jì)算的累積入滲量與實(shí)測(cè)累積入滲量之間的吻合程度較差,均方根差均大于0.5。說明在添加保水劑的條件下采用Philip入滲模型確定入滲參數(shù)時(shí)較為精確。
[Abstract]:Drought and soil degradation have made the application of 緯 -polyglutamic acid (緯-PGA), a new water-retaining agent, to water saving irrigation in farmland. Based on the indoor vertical one-dimensional infiltration test, the effects of 緯-PGA on soil water infiltration capacity were analyzed, and the Philip model and Green-Ampt infiltration model were compared and analyzed. The results showed that with the increase of 緯-PGA application rate, the cumulative infiltration rate and infiltration rate decreased monotonously compared with the control group, and the fitting results of the two infiltration models showed that: in the Philip formula, In the Green-Ampt formula, the product of saturated water conductivity and soil water suction showed a decreasing trend. The results of comparison and analysis between Philip model and Green-Ampt infiltration model showed that the calculated parameters of Philip model and fitting parameters were consistent with each other. However, the consistency between the calculation parameters and fitting parameters of Green-Ampt model is poor, and the degree of agreement between the cumulative infiltration calculated by Philip model and the measured cumulative infiltration is high. The root mean square error (RMS) is less than 0.5, and the RMS root difference is greater than 0.5, and the agreement between the cumulative infiltration calculated by the Green-Ampt model and the measured cumulative infiltration is not good. It shows that the Philip infiltration model is more accurate in determining the infiltration parameters under the condition of adding water retaining agent.
【作者單位】： 西北旱區(qū)生態(tài)水利工程國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地(西安理工大學(xué));黃土高原土壤侵蝕與旱地農(nóng)業(yè)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51379173) 新疆維吾爾自治區(qū)科技計(jì)劃項(xiàng)目(2011301033)
【分類號(hào)】：S152.7

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 白丹,李占斌;應(yīng)用遺傳算法擬合渾水入滲經(jīng)驗(yàn)公式[J];農(nóng)業(yè)工程學(xué)報(bào);2003年03期

2 樊惠芳,羅碧玉;渾水膜縫入滲規(guī)律試驗(yàn)研究[J];楊凌職業(yè)技術(shù)學(xué)院學(xué)報(bào);2003年04期

3 張娟娟,劉恩民,鄭麗萍;土壤經(jīng)驗(yàn)入滲指數(shù)的移動(dòng)窗口統(tǒng)計(jì)特性[J];地下水;2004年03期

4 吳軍虎,費(fèi)良軍,李懷恩;灌施條件下波涌灌溉土壤間歇入滲硝態(tài)氮運(yùn)移特性試驗(yàn)研究[J];灌溉排水學(xué)報(bào);2004年05期

5 張雅楠;黃興法;毛麗麗;劉汗;;土壤入滲性能自動(dòng)測(cè)量系統(tǒng)原理與應(yīng)用研究[J];農(nóng)業(yè)工程學(xué)報(bào);2007年04期

6 張建豐;王文焰;賈中華;;具有砂質(zhì)夾層的土壤連續(xù)函數(shù)入滲模型[J];水土保持學(xué)報(bào);2007年04期

7 卞艷麗;曹惠提;黃福貴;侯愛中;;渾水灌溉下的土壤入滲規(guī)律研究[J];水利科技與經(jīng)濟(jì);2009年08期

8 盧修元;魏新平;邱s，

本文編號(hào)：2280882