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基于電磁感應(yīng)的典型干旱區(qū)土壤鹽分時空變異快速診斷
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國家公益性行業(yè)（農(nóng)業(yè)）科研專項經(jīng)費(fèi)項目（200903001）,、國家自然科學(xué)基金資助項目（40771097）,、新疆自治區(qū)科技攻關(guān)重點課題(200733144-1)和中國科學(xué)院知識創(chuàng)新工程重大資助項目(KSCX1-YW-09)


Rapid Diagnosis of Soil Salinity Temporal-spatial Variances Based on Electromagnetic Induction in a Typical Arid Area
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    摘要:

    選取南疆典型干旱區(qū)研究其土壤鹽分時空變異,，在研究區(qū)域選取校正點測定表觀電導(dǎo)率(ECa)，并同時采集土壤樣品,，研究表明土壤鹽分含量與大地表觀電導(dǎo)率具有良好相關(guān)性（R=0.935）,，可由此建立土壤鹽分電磁感應(yīng)解譯模型,。構(gòu)建移動式磁感調(diào)查系統(tǒng)對研究區(qū)域進(jìn)行調(diào)查,，獲取足量表觀電導(dǎo)率信息，結(jié)合GIS和地統(tǒng)計等相關(guān)知識研究土壤鹽分的空間異質(zhì)性,。經(jīng)過不同年份,、不同季節(jié)的調(diào)查實現(xiàn)時空變異的快速診斷。結(jié)果表明,，研究區(qū)域存在嚴(yán)重的鹽漬化問題,，且存在秋季鹽漬化重于春季，2009年重于2008年的趨勢,。

    Abstract:

    A typical arid area in South Xinjiang was selected to study the temporal-spatial variances of soil salinity. Calibration sites were selected in the study area. Apparent electrical conductivities (ECa) were measured, and soil samples were collected in the calibration sites. The results showed there was a good correlation between soil salt content and the apparent electrical conductivity, so the interpretation model for soil salinity could be established. A mobile electromagnetic induction survey system was constructed to survey the study area with enough ECa data collected. The spatial variance could be studied with GIS and geo-statistics knowledge, and the temporalspatial variances could be rapid diagnosed by EM surveys over different times. The results showed serious salinization exited in the study area, and salinization in autumn was worse than that in spring, salinization in 2009 was more serious than that in 2008. 

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李曉明,楊勁松,劉廣明,劉梅先,姚榮江.基于電磁感應(yīng)的典型干旱區(qū)土壤鹽分時空變異快速診斷[J].農(nóng)業(yè)機(jī)械學(xué)報,2011,42(5):79-85. Li Xiaoming, Yang Jingsong, Liu Guangming, Liu Meixian, Yao Rongjiang. Rapid Diagnosis of Soil Salinity Temporal-spatial Variances Based on Electromagnetic Induction in a Typical Arid Area[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(5):79-85.

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