本文關(guān)鍵詞： 蓄水多坑 灌施 尿素 運(yùn)移轉(zhuǎn)化　出處：《灌溉排水學(xué)報》2017年06期 　論文類型：期刊論文

【摘要】：為提高蓄水多坑灌施尿素條件下土壤氮素利用率和保護(hù)生態(tài)環(huán)境,通過室內(nèi)蓄水多坑(土箱半徑40 cm,高120 cm,蓄水坑半徑16 cm,深度60 cm)物理模型試驗,研究了蓄水多坑灌施下尿素在土壤中的運(yùn)移轉(zhuǎn)化特性。結(jié)果表明,土壤水分主要分布在地表以下20~80 cm,0~10 cm土層土壤含水率較小,同一土壤深度處蓄水坑壁附近土壤含水率大于0通量面處土壤含水率;同一土壤深度蓄水坑壁附近土壤尿素態(tài)氮量大于0通量面處的尿素態(tài)氮量,尿素的水解在9 d內(nèi)基本完成,第7天水解最快,尿素水解與時間存在良好的對數(shù)函數(shù)關(guān)系;土壤銨態(tài)氮主要集中在40~60 cm土層土壤中,且r=20 cm處的量高于0通量面處的;而土壤硝態(tài)氮的分布趨勢與銨態(tài)氮相反,隨時間的延長,0通量面和r=20 cm處的土壤銨態(tài)氮質(zhì)量分?jǐn)?shù)均在40~60 cm和60~80 cm增幅較大,而土壤硝態(tài)氮質(zhì)量分?jǐn)?shù)表現(xiàn)出在90~100 cm濕潤鋒處增幅最大。
[Abstract]:In order to improve the soil nitrogen utilization rate and protect the ecological environment under the condition of water storage and multi-pit irrigation with urea, the indoor water storage pit (the radius of soil box is 40 cm, the height is 120 cm, the radius of storage pit is 16 cm) is adopted. The characteristics of urea migration and transformation in soil under irrigation with water storage and multi-pit irrigation were studied. The results showed that soil moisture was mainly distributed at 20 ~ 80 cm below the ground surface. The soil moisture content of 0 ~ 10 cm soil layer is small, and the soil moisture content near the water storage pit wall at the same soil depth is greater than that of the zero flux surface. The amount of urea nitrogen in the soil near the wall of the same depth storage pit was greater than the amount of urea nitrogen at the flux surface of 0. The hydrolysis of urea was basically completed within 9 days, and the hydrolysis was the fastest on the 7th day. There is a good logarithmic relationship between urea hydrolysis and time. The concentration of ammonium nitrogen was mainly in the soil layer of 40 ~ 60 cm, and the amount of soil ammonium nitrogen at 20 cm was higher than that at 0 ~ (th) flux surface. However, the distribution trend of nitrate nitrogen in soil was opposite to that in ammonium nitrogen, and the distribution trend of nitrate nitrogen increased with time. The mass fraction of ammonium nitrogen in the soil at 0 flux surface and 20 cm rn increased greatly in the range of 40 ~ 60 cm and 60 ~ 80 cm. However, the soil nitrate content showed the largest increase at the wet front of 90 ~ 100 cm.
【作者單位】： 太原理工大學(xué)水利科學(xué)與工程學(xué)院;山西水利職業(yè)技術(shù)學(xué)院;
【基金】：國家自然科學(xué)基金項目(51409184) 山西省青年科技研究基金項目(201601D202070) 高等學(xué)校博士學(xué)科點(diǎn)專項科研基金項目(20130402110008) 太原理工大學(xué)�；痦椖�(2013Z071) 企事業(yè)合作項目(ZNGZ2015-036)
【分類號】：S143.14;S275
【正文快照】： 李京玲,楊文慧,孫西歡,等.蓄水多坑灌施下尿素在土壤中的運(yùn)移轉(zhuǎn)化特性[J].灌溉排水學(xué)報,2017,36(6):31-35.0引言蓄水坑灌是針對我國北方地區(qū)存在的干旱和水土流失問題而提出的一種節(jié)水灌溉方法[1],主要適用于我國北方山丘區(qū)的果林灌溉。根據(jù)土壤水分運(yùn)動狀況,蓄水坑灌入滲可分

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 胡昱欣;李育松;卞建民;郝鵬飛;;一定灌施條件下大安灌區(qū)土壤氮素遷移規(guī)律[J];吉林農(nóng)業(yè)大學(xué)學(xué)報;2013年03期

相關(guān)碩士學(xué)位論文 前1條

1 王軍;蓄水單坑灌施條件下不同土溫和水溫對土壤水氮運(yùn)移規(guī)律的影響[D];太原理工大學(xué);2015年

，

本文編號：1491923