本文選題：鹽堿地 + 土壤改良劑　； 參考：《草業(yè)科學(xué)》2017年06期

【摘要】：改良鹽堿化土壤是當前亟待解決的環(huán)境問題,合理選用土壤改良劑和改良方法對鹽堿地的開發(fā)利用有重要意義。本研究以蘭州新區(qū)的鹽堿土為盆栽土進行盆栽種植草地早熟禾(Poa pratensis)試驗,設(shè)有底層襯膜施加不同土壤改良劑的10個處理、底層襯膜不施加土壤改良劑和不襯膜施加1號改良劑。通過測定施加改良劑前土壤的基本理化性質(zhì)及施加土壤改良劑后土壤p H、全鹽量及草地早熟禾的生長指標,對不同的土壤改良劑的效果進行分析對比,選擇出最有效的土壤改良劑和改良方法。結(jié)果表明,施加土壤改良劑后土壤的p H和全鹽量低于施加前,草地早熟禾的高度、密度和蓋度優(yōu)于沒有添加改良劑的處理。所選10種鹽堿改良劑中,嗜鹽堿微生物菌肥改良劑效果最好,改良后土壤p H和全鹽量分別為7.37和0.28%,比改良前分別降低了1.09和0.32%,草地早熟禾的高度、密度、蓋度及葉綠素含量分別為9.68 cm、2.09株·cm~(-2)、99%、3.13 mg·g~(-1),改良效果優(yōu)于無機改良劑和有機肥。土壤底層襯膜對鹽堿土的改良效果優(yōu)于底層不襯膜處理,襯膜處理下土壤p H、全鹽量、草地早熟禾生長密度、高度與不襯膜處理相比差異顯著(P0.05)。
[Abstract]:Improving salinized soil is an urgent environmental problem at present. The rational selection of soil improver and improvement method is of great significance to the development and utilization of saline-alkali land. In this study, the potted saline soil of Lanzhou New area was used for pot planting of POA pratensis. There were 10 treatments with different soil modifier, no soil modifier and no film. The physical and chemical properties of the soil before the application of the modifier, the soil pH, the total salt content and the growth index of Kentucky bluegrass were determined before and after the application of the modifier, and the effects of different soil modifiers were analyzed and compared. Select the most effective soil improver and improve the method. The results showed that the soil pH and total salt content were lower than those before application, and the height, density and coverage of Kentucky bluegrass were better than those without the modifier. The soil pH and total salt content of the improved soil were 7.37 and 0.28, respectively, which were 1.09 and 0.32 lower than those before the improvement, and the height and density of Kentucky bluegrass were decreased. The coverage and chlorophyll content were 9.68 cm ~ (-1) and 9.68 cm ~ (-1), respectively. The effect of improvement was better than that of inorganic modifier and organic fertilizer. The effect of soil substrate film on the improvement of saline-alkali soil was better than that of the bottom layer without film treatment. The soil pH, total salt content, growth density and height of Kentucky bluegrass under the film lining treatment were significantly different from those of the unlined film treatment (P 0.05).
【作者單位】： 草地農(nóng)業(yè)生態(tài)系統(tǒng)國家重點實驗室蘭州大學(xué)草地農(nóng)業(yè)科技學(xué)院;
【基金】：蘭州市科技計劃項目——秦王川鹽堿地改良與園林綠化技術(shù)研究與示范(2013-1-145)
【分類號】：S156.4;S688.4

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