Effect of bentonite as a soil amendment on field water-holding capacity, and millet photosynthesis and grain quality
文献类型： 外文期刊
作者： Mi, Junzhen 1 ; Gregorich, Edward G. 2 ; Xu, Shengtao 3 ; McLaughlin, Neil B. 2 ; Liu, Jinghui 1 ;
作者机构： 1.Inner Mongolia Agr Univ, Natl Outstanding Agr Res Talents & Innovat Team, Hohhot 010019, Inner Mongolia, Peoples R China
2.Ottawa Res & Dev Ctr, Agr & Agri Food Canada, Cent Expt Farm, Ottawa, ON K1A 0C6, Canada
3.Yunnan Acad Agr Sci, Agr Environm & Resources Inst, Kunming 650205, Yunnan, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2020 年 10 卷 1 期
页码：
收录情况： SCI
摘要： A field experiment was conducted in a semi-arid region in northern China to evaluate the effects of bentonite soil amendment on field water-holding capacity, plant available water, and crop photosynthesis and grain quality parameters for millet [Setaria italic (L.) Beauv.] production over a 5-year period. Treatments included six rates of bentonite amendments (0, 6, 12, 18, 24 and 30 Mg ha(-1)) applied only once in 2011. The application of bentonite significantly (P < 0.05) increased field water-holding capacity and plant available water in the 0-40 cm layer. Bentonite also significantly (P < 0.05) increased the emergence rate, above-ground dry matter accumulation (AGDM), net photosynthesis rate (Pr), transpiration rate (Tr), soil and plant analysis development (SPAD) and leaf water use efficiency (WUE). It also increased grain quality parameters including grain protein, fat and fiber content. Averaged over all the years, the optimum rate of bentonite was 24 Mg ha-1 for all plant growth and photosynthesis parameters except for grain quality where 18 Mg ha-1 bentonite had the greatest effect. This study suggests that bentonite application in semi-arid regions would have beneficial effects on crop growth and soil water-holding properties.
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