EFFECTS OF STRAW RETURN AND BIOCHAR APPLICATION ON SOIL NUTRIENTS AND OSMOTIC REGULATION IN COTTON UNDER DIFFERENT SOIL SALINITY LEVELS

IF 0.6 4区 环境科学与生态学 Q4 ECOLOGY
W.D. Li, H. Wang, M. Zhong, J. Song, X. Shi, T. Tian, J. Wang, Y. Zhu, M. Jiang
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引用次数: 1

Abstract

. To clarify the effects of straw return and biochar application on the amelioration of soils with different salinity levels and cotton growth, in this soil column simulation test, straw and biochar were applied to soils with different salinity levels (1.5 (S1), 5 (S2) and 10 (S3) g/kg), with application rates equal to the same amount of carbon (two carbon levels: 6 t/hm 2 of straw (C1) = 2.25 t/hm 2 of biochar (B1); 12 t/hm 2 of straw (C2) = 4.5 t/hm 2 of biochar (B2)). Then, changes in soil physicochemical properties and cotton physiology were determined. The results showed that straw return and biochar application reduced soil salinity at S1, S2, and S3 levels. Besides, both of them increased soil water, total nitrogen, organic matter, available phosphorus, and available potassium contents, but there was no difference between S3 soil and S1 soil and between S3 soil and S2 soil ( p > 0.05). Straw return and biochar application also increased chlorophyll and soluble sugar contents in cotton leaves ( p < 0.05), and decreased the relative conductivity and malondialdehyde content in S1 and S2 soils ( p < 0.05). However, in S3 soil, there was no difference between C1 treatments and CK and between B1 treatments and CK ( p > 0.05). Thus, straw return and biochar application can improve the physicochemical properties of saline soil and regulate osmolytes in cotton, but the amelioration effect of low application rates on high-salinity soils is insignificant ( p > 0.05).
不同土壤盐分水平下秸秆还田和生物炭施用对土壤养分及棉花渗透调节的影响
. 为明确秸秆还田和生物炭施用对不同盐度土壤改良和棉花生长的影响,在土壤柱模拟试验中,在不同盐度土壤(1.5 (S1)、5 (S2)和10 (S3) g/kg)上施用秸秆和生物炭,施用量相同(两个碳水平:秸秆6 t/hm 2 (C1) =生物炭2.25 t/hm 2 (B1);12t / hm2秸秆(C2) = 4.5 t/ hm2生物炭(B2))。然后,测定土壤理化性质和棉花生理变化。结果表明,秸秆还田和施用生物炭可降低土壤S1、S2和S3水平的盐分。土壤水分、全氮、有机质、速效磷、速效钾含量均增加,但S3土壤与S1土壤、S3土壤与S2土壤间差异不显著(p < 0.05)。秸秆还田和生物炭处理提高了棉花叶片叶绿素和可溶性糖含量(p < 0.05),降低了S1和S2土壤的相对电导率和丙二醛含量(p < 0.05)。而在S3土壤中,C1处理与CK、B1处理与CK无显著差异(p < 0.05)。因此,秸秆还田和生物炭施用可以改善盐渍土的理化性质,调节棉花的渗透物质,但低施用量对高盐渍土的改善作用不显著(p > 0.05)。
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来源期刊
Applied Ecology and Environmental Research
Applied Ecology and Environmental Research ECOLOGY-ENVIRONMENTAL SCIENCES
CiteScore
1.40
自引率
14.30%
发文量
104
审稿时长
14 months
期刊介绍: The Journal publishes original research papers and review articles. Researchers from all countries are invited to publish pure or applied ecological, environmental, biogeographical, zoological, botanical, paleontological, biometrical-biomathematical and quantitative ecological or multidisciplinary agricultural research of international interest on its pages. The focus is on topics such as: -Community, ecosystem and global ecology- Biometrics, theoretical- and quantitative ecology- Multidisciplinary agricultural and environmental research- Sustainable and organic agriculture, natural resource management- Ecological methodology, monitoring and modeling- Biodiversity and ecosystem research, microbiology, botany and zoology- Biostatistics and modeling in epidemiology, public health and veterinary- Earth history, paleontology, extinctions, biogeography, biogeochemistry- Conservation biology, environmental protection- Ecological economics, natural capital and ecosystem services- Climatology, meteorology, climate change, climate-ecology. The Journal publishes theoretical papers as well as application-oriented contributions and practical case studies. There is no bias with regard to taxon or geographical area. Purely descriptive papers (like only taxonomic lists) will not be accepted for publication.
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