【摘要】：為確定添加生物質(zhì)炭對(duì)旱作農(nóng)田土壤持水特性的影響,在隆中黃土高原典型旱作農(nóng)田區(qū)設(shè)置相關(guān)定位試驗(yàn),對(duì)不同生物質(zhì)炭輸入水平的土壤容重、土壤孔隙度、土壤水分常數(shù)及土壤水分特征曲線進(jìn)行測(cè)定。結(jié)果表明,生物質(zhì)炭的添加能夠減小土壤容重,增加土壤孔隙度。隨著生物質(zhì)炭輸入水平的增加,土壤容重的減小及土壤孔隙度的增加幅度加大。生物質(zhì)炭達(dá)到50t/hm~2時(shí)土壤結(jié)構(gòu)變化最為明顯,0—5,5—10,10—30cm土層中土壤容重相比對(duì)照分別減小7.01%,9.91%,16.60%,土壤毛管孔隙度分別增加19.47%,21.02%,29.94%;并且生物質(zhì)炭的施入可以增加土壤飽和含水量、土壤田間持水量、土壤有效水分含量。隨著生物質(zhì)炭輸入水平的不斷加大,各水分常數(shù)呈現(xiàn)出上升趨勢(shì),但當(dāng)生物質(zhì)炭輸入水平達(dá)到40t/hm~2后漲幅空間開始減小。說(shuō)明生物質(zhì)炭的添加能夠提高旱作農(nóng)田的持水性能,但輸入水平達(dá)到40t/hm~2后,土壤持水性能趨于穩(wěn)定。
[Abstract]:In order to determine the effect of biomass carbon addition on the soil water retention characteristics of dryland farmland, the soil bulk density and soil porosity of different biomass carbon input levels were tested in the typical dryland farmland area of the Loess Plateau in the middle of the Loess Plateau. Soil moisture constant and soil moisture characteristic curve were measured. The results showed that the addition of biomass carbon could reduce soil bulk density and increase soil porosity. With the increase of biomass carbon input level, soil bulk density decreased and soil porosity increased. The soil structure of biomass carbon reached 50 t / hm ~ 2. The soil bulk density in 0-55-1010 ~ (-30) cm soil layer decreased 7.01% 9.91 ~ (-1) and 16.60% respectively, and the porosity of soil capillary increased 19.47% ~ 21.02% (29.94) respectively, and the application of biomass charcoal increased the saturated water content of soil. Soil field water holding capacity, soil available moisture content. With the increasing of biomass carbon input level, the water constants showed an upward trend, but when the biomass carbon input level reached 40t/hm~2, the increase space began to decrease. The results showed that the addition of biomass carbon could improve the water holding capacity of dryland farmland, but when the input level reached 40t/hm~2, the water holding capacity of soil tended to be stable.
【作者單位】： 甘肅農(nóng)業(yè)大學(xué)資源與環(huán)境學(xué)院;農(nóng)業(yè)部環(huán)境保護(hù)科研監(jiān)測(cè)所;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(31571594,31160269) 國(guó)家“十二五”循環(huán)農(nóng)業(yè)科技工程項(xiàng)目(2012BAD14B03) 甘肅省自然科學(xué)基金項(xiàng)目(145RJZA106)
【分類號(hào)】：S152.7

【相似文獻(xiàn)】

相關(guān)期刊論文 前9條

1 黃中雄;土壤水分常數(shù)測(cè)定之我見[J];廣西氣象;2005年02期

2 王曉東;魏遠(yuǎn)強(qiáng);楊召瓊;;土壤水分常數(shù)的測(cè)定方法和問(wèn)題探討[J];內(nèi)江科技;2010年04期

3 毛云玲;王鵬云;曾艷;李萬(wàn)春;張雨;馮倩;;昆明市土壤水分常數(shù)特征分析[J];西部林業(yè)科學(xué);2011年02期

4 易湘生;李國(guó)勝;尹衍雨;;青海三江源地區(qū)土壤水分常數(shù)轉(zhuǎn)換函數(shù)的建立與比較[J];中國(guó)生態(tài)農(nóng)業(yè)學(xué)報(bào);2012年08期

5 張景略,苗付山;黃泛平原不同質(zhì)地土壤的物理性粘粒含量與幾個(gè)土壤水分常數(shù)的關(guān)系[J];土壤通報(bào);1984年05期

6 楊金樓;;第三講 土壤水分常數(shù)和水分分類[J];現(xiàn)代化農(nóng)業(yè);1989年03期

7 劉軍;謝德體;魏朝富;楊劍虹;;四川主要土壤水分常數(shù)研究[J];西南農(nóng)業(yè)大學(xué)學(xué)報(bào);1993年01期

8 趙秀蘭;黑龍江省土壤水分常數(shù)的空間分布特征[J];黑龍江氣象;2001年04期

9 蔣俊明;蔡小虎;陸元昌;吳學(xué)友;何飛;;石礫對(duì)土壤水分常數(shù)的影響[J];四川林業(yè)科技;2008年06期

，

本文編號(hào)：2187091