本省中部地區設施內土壤鹽分累積調查研究

Study of Soil Salt Accumulation under Strutural Facility in the Central Taiwan

陳鴻堂(Houng-Tang Chen) ； 林景和(Ching-Ho Lin) ； 紀秋來(Chiu-Lai Chi) ； 王銀波(Yin-Po Wang)

《臺中區農業改良場研究彙報》 45期 (1994/12) Pp. 19-26

https://doi.org/10.6956/BTDAIS.199412.0019

摘要

本研究旨在測定本省中部地區設施內土壤電導度以了解其鹽分累積之狀況。試驗上逢機選取栽培設施內土壤30處及供做對照用之設施外土壤18處，測定其各土層土水比為1：5之土壤電導度。結果顯示30個設施內0～5 cm土層之電導度大於0.8 dS m^(-1)者佔73%，其中大於1.5 dS m^(-1)佔50%以上，由此可知本省中部地區設施內多有鹽分累積現象，又無論設施內、外土壤其5 cm以下之土壤電導度大於0.8 dS m^(-1)者已甚少，顯示鹽分累積多集中在0～5 cm土層。測定影響土壤抽出液電導度之各種離子濃度發現不同土類之設施內土壤中以SO4^(2-)及NO3^-含量最高，且此三種離子均與土壤電導度呈顯著關係。另一調查結果顯示本省中部設施經營一年以內者土壤電導度就已偏高達1.09 dS m^(-1)，此對鹽分忍受力較低之作物就可能造成減產。而栽培之設施達1～2年、2～3年及3年以上時，其內土壤電導度則高達2.02～2.64 dS m^(-1)，此將可能嚴重影響作物生長，值得栽培業者及農政單位注意。

關鍵字

設施栽培 ； 土壤 ； 鹽分累積

並列摘要

This study is through the measurement of soil electrical conductivity to understand the soil salt accumulation condition under strutural facility in the central Taiwan. The 30 random soil samples and 18 soil samples is collected from strutural facility and open field for E.C. determination respectively. The result indicated that the E.C. value with in 0~5 cm soil layer of which 73% and 50% is larger than 0.8 dS m^(-1) and 1.5 dS m^(-1), respectively. This reveald that soil salt accumulation is occurred under strutural facility in central Taiwan and most of salt accumulation is concentrated in 0~5 cm soil layer. The ion concentration that affected E.C. value of soil extracts under strutural facility is SO4^(2-) and NO3^-. Further investigation indicated that the soil E.C. value is reached 1.09 dS m^(-1) under on year of strutural production. The crop which is less tolerant to salt condition will resulted in yield reduction. The soil E.C. value over 1~2, 2~3 and 3 years of under strutural production is reached 2.02~2.04 dS m^(-1) and will greatly affect crop growth.

並列關鍵字

strutural cultivation ； soil ； salt accumulation