本文關(guān)鍵詞： 設(shè)施土壤 灌溉方式 硝態(tài)氮積累 土壤pH　出處：《農(nóng)業(yè)環(huán)境科學(xué)學(xué)報》2017年11期 　論文類型：期刊論文

【摘要】：以不同灌溉方式下設(shè)施土壤及番茄為研究對象,采用田間試驗與室內(nèi)分析相結(jié)合的方法,對連年采用溝灌、滴灌和滲灌灌溉方式的設(shè)施土壤硝態(tài)氮、全鹽含量、pH及番茄果實硝酸鹽含量、水分生產(chǎn)效率進行了研究。結(jié)果表明:三種灌溉方式土壤硝態(tài)氮、全鹽含量均呈現(xiàn)出明顯的表聚現(xiàn)象,0~20 cm土層范圍內(nèi),滴灌處理硝態(tài)氮含量和全鹽含量明顯低于溝灌和滲灌處理;不同灌溉方式土壤的pH值均隨著土層加深而升高,在0~30 cm土層范圍,土壤pH值滴灌高于溝灌,溝灌高于滲灌。溝灌和滲灌番茄果實硝酸鹽含量顯著高于滴灌,溝灌和滲灌番茄果實硝酸鹽含量差異不顯著;滲灌和滴灌水分生產(chǎn)效率明顯高于溝灌。土壤硝態(tài)氮含量與土壤pH值呈極顯著負(fù)相關(guān),與全鹽含量呈極顯著正相關(guān)�？傊�,設(shè)施土壤硝態(tài)氮積累與土壤全鹽含量、pH值、番茄果實硝酸鹽含量關(guān)系密切;與溝灌和滲灌相比,滴灌更有利于抑制土壤退化。
[Abstract]:In this paper, the greenhouse soil and tomato under different irrigation methods were used as the research objects, and the nitrate nitrogen of the facility soil was studied by the combination of field experiment and indoor analysis, and the irrigation methods of furrow irrigation, drip irrigation and infiltration irrigation were used in successive years. The total salt content (pH), nitrate content of tomato fruit and water production efficiency were studied. The results showed that the soil nitrate nitrogen and total salt content of three irrigation methods showed apparent superaggregation within 20 cm soil layer. The content of nitrate nitrogen and total salt in drip irrigation treatment was significantly lower than that in furrow irrigation and infiltration irrigation, and the pH value of different irrigation methods increased with the deepening of soil layer, and the soil pH value of drip irrigation was higher than that of furrow irrigation in 0 ~ 30 cm soil layer. The nitrate content of furrow irrigation and infiltration irrigation tomato fruit was significantly higher than that of drip irrigation, but there was no significant difference between ditch irrigation and infiltration irrigation tomato fruit nitrate content. The water production efficiency of infiltration irrigation and drip irrigation was significantly higher than that of furrow irrigation. The soil nitrate content was negatively correlated with soil pH value and positively correlated with total salt content. Compared with furrow irrigation and infiltration irrigation, drip irrigation was more favorable to restrain soil degradation.
【作者單位】： 沈陽農(nóng)業(yè)大學(xué)土地與環(huán)境學(xué)院土肥資源高效利用國家工程實驗室;
【基金】：國家自然科學(xué)基金項目(41501306) 國家科技支撐計劃課題(2015BAD23B01) 遼寧省自然科學(xué)基金項目(2014027013) 遼寧省教育廳項目(L2015474)~~
【分類號】：S153;S275

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