Can biodegradable film replace polyethylene film to obtain similar mulching effects on soil functions and maize productivity in irrigation region? A three-year experimental appraisal

IF 9.7 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Xiao-Bin Xiong , Peng-Yang Wang , Ze-Ying Zhao , Jing Wang , Shu-Tong Liu , Fu-Jian Mei , Wen-Ying Wang , Yi-Bo Wang , Xiang-Wen Fang , Ying Zhu , Jin-Lin Zhang , Ning Wang , Jun-Min Jin , Hong-Yan Tao , You-Cai Xiong
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引用次数: 0

Abstract

There is widespread controversy over whether biodegradable films (BFs) can replace polyethylene films (PEFs) to obtain similar mulching effects on crop yield and soil physicochemical properties in arid irrigated regions. To explore this issue, a three-year field experiment was conducted using two widely-used BFs (black and transparent BFs respectively) and traditional transparent PEFs as mulching materials to examine their aging characteristics and mulching effects in an irrigation maize field of northwest China (no-mulching as CK). The data revealed a noticeable decrease in surface integrity after aging for both BFs compared with PEFs, yet the surface cracks of BFs showed dispersed and randomly distributed characteristics. Particularly, BFs was not fully degraded within each growing season as desired, across 3 growing seasons. The aging properties of black and transparent BFs and their effects on soil functions were essentially indistinguishable. The aging of BFs significantly augmented the abundance of fragment- and fiber-shaped microplastics (MPs) in soils, relative to PEFs (p < 0.05). Intriguingly, BFs mulching achieved comparable soil warming effects as PEFs did, under sunny and rainy days in each growing season. However, soil water storage at plough and deep soil layer for both BFs was significantly lower than that of PEFs (p < 0.05). BFs mulching significantly improved the proportion of soil macroaggregates relative to PEFs (p < 0.05), and evidently decreased soil bulk density (p < 0.05). Moreover, it significantly improved soil labile organic carbon (LOC) content, while lowering soil total nitrogen, nitrate-nitrogen, and ammonium-nitrogen content relative to that of PEFs (p < 0.05). Critically, relative to PEFs, BFs mulching harvested similar crop biomass and economic benefits, and better soil functions. The findings provided new insights into the reasonable usage and management of BFs for better sustainability in agricultural practice.

Abstract Image

Abstract Image

在灌区,生物可降解地膜能否替代聚乙烯地膜获得与聚乙烯地膜相似的覆盖效果?三年实验鉴定
在干旱灌区,生物可降解地膜能否替代聚乙烯地膜获得与聚乙烯地膜相似的覆盖效果,在作物产量和土壤理化性质方面存在广泛争议。为探讨这一问题,在西北地区某灌溉田(对照为无地膜)进行了为期3年的田间试验,采用两种广泛使用的玉米秸秆(分别为黑色秸秆和透明秸秆)和传统透明秸秆作为地膜材料,研究了它们的老化特性和地膜效果。数据显示,与PEFs相比,两种BFs老化后表面完整性明显下降,但BFs表面裂纹呈现出分散和随机分布的特征。特别是,在3个生长季节中,BFs在每个生长季节都没有完全降解。黑色和透明bf的老化特性及其对土壤功能的影响基本无法区分。与PEFs相比,BFs的老化显著增加了土壤中碎片状和纤维状微塑料(MPs)的丰度(p<0.05)。有趣的是,在每个生长季节的晴天和雨天,BFs覆盖的土壤增温效果与PEFs相当。两种生物群落耕层和深层土壤储水量显著低于生物群落(p < 0.05)。覆盖生物秸秆显著提高了土壤大团聚体比例(p < 0.05),显著降低了土壤容重(p < 0.05)。土壤活性有机碳(LOC)含量显著提高,全氮、硝态氮和铵态氮含量相对于PEFs有显著降低(p<0.05)。重要的是,相对于还田还田,还田还田获得了相似的作物生物量和经济效益,并且土壤功能更好。研究结果为生物多样性资源的合理利用和管理提供了新的思路。
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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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