干旱区生态环境知识资源中心(Arid): Improving effect of potassium in organic amendments on sodic soils

Arid

DOI	10.1080/00380768.2021.1972753
	Improving effect of potassium in organic amendments on sodic soils
	Tong, Limin; Fan, Fu; Watanabe, Akira
通讯作者	Tong, LM (corresponding author), Nagoya Univ, Grad Sch Bioagr Sci, Chikusa Ku, Nagoya, Aichi 4648601, Japan.
来源期刊	SOIL SCIENCE AND PLANT NUTRITION
ISSN	0038-0768
EISSN	1747-0765
出版年	2021-09
英文摘要	Sodification is a major soil problem that limits plant productivity in arid and semi-arid regions. For ameliorating sodic soils, the application of chemical amendments that can release calcium (Ca), which expels soil exchangeable sodium (Na), is the most widely accepted approach for solving this problem. However, an alternative more economical method would be desired in developing countries that have large areas of sodic soils. The goal of the present study was to examine the effectiveness of using compost to expel soil exchangeable Na. Composts made from cattle manure, rice straw, and rapeseed pomace were added to a sodic soil (Tongliao, Inner Mongolia, China) at mass ratios of 0 - 10%, and the soil was leached with water. Soil exchangeable cations in the forms of outer sphere and inner sphere complexes were then extracted successively and their concentrations determined. Changes in the soil dispersibility resulting from the addition of compost was also examined. The concentration of Na in both the outer sphere and inner sphere complexes decreased when rice straw or rapeseed pomace compost added, but this was not observed when cattle manure compost, which is abundant in water-soluble Na, was used. The amount of K in both forms increased with increasing rate of addition of each compost, suggesting that the K in the compost replaced both the Na that is adsorbed to soil by electrostatic attraction and by chemical interactions. The largest removal of Na, 73% for outer sphere complex and 93% for inner sphere complex, was attained in the case of rapeseed pomace compost, which had the largest water-soluble K/water-soluble Na ratio, at a mass ratio of 5%. The addition of compost also neutralized soil pH and reduced soil dispersion, the latter being effective in improving the physical properties of the soil.
英文关键词	Compost potassium sodic soil sodium soil dispersibility
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000693288500001
WOS关键词	EXCHANGEABLE POTASSIUM ; HYDRAULIC CONDUCTIVITY ; SALINE ; RECLAMATION ; ADSORPTION ; HYDRATION ; MATTER ; MANURE ; RICE
WOS类目	Plant Sciences ; Environmental Sciences ; Soil Science
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364706
作者单位	[Tong, Limin; Watanabe, Akira] Nagoya Univ, Grad Sch Bioagr Sci, Chikusa Ku, Nagoya, Aichi 4648601, Japan; [Fan, Fu] Inner Mongolia Univ Nationalities, Coll Agr, Horqin Tongliao, Peoples R China
推荐引用方式 GB/T 7714	Tong, Limin,Fan, Fu,Watanabe, Akira. Improving effect of potassium in organic amendments on sodic soils[J],2021.
APA	Tong, Limin,Fan, Fu,&Watanabe, Akira.(2021).Improving effect of potassium in organic amendments on sodic soils.SOIL SCIENCE AND PLANT NUTRITION.
MLA	Tong, Limin,et al."Improving effect of potassium in organic amendments on sodic soils".SOIL SCIENCE AND PLANT NUTRITION (2021).