Effects of Different Amendments on Saline-alkali Soil Improvement and Cotton Growth in Xinjiang

doi:10.11924/j.issn.1000-6850.casb2021-1180

Abstract

Abstract:

Focusing on the characteristics of saline-alkali soil in the arid area of Xinjiang, the most appropriate soil amendment for saline-alkali soil improvement was screened. We carried out field plot experiments, designed four treatments, including control group (CK), Yanjianzhuanjia (Y), urea phosphate (L) and Weilizhuang (W), and analyzed the effects of soil amendments on the salinity, pH, total alkalinity, and sodium adsorption ratio (SAR) in 20 cm surface layer of medium saline-alkali soil and cotton seedling growth and yield. The results showed that all amendments reduced soil salt content and pH, promoted cotton seedling growth and improved cotton yield. Compared with CK, Y treatment and L treatment had better effects of restraining salt, and reduced the relative salinity increase rate by 107.73% and 101.67%, respectively; Y treatment significantly decreased soil pH by 0.15 units, and significantly promoted cotton seedling growth and increased cotton yield by 5.84%; Y treatment and W treatment had the best effects on reducing total alkalinity of soil, with an significant decrease by 0.46 and 0.41 units, respectively, but their reducing effects on SAR were not obviously different from CK. In conclusion, according to the effects of all amendments on soil physical and chemical properties and cotton yield, Yanjianzhuanjia is recommended as the most suitable saline-alkali soil amendment for the test area.

Key words: saline-alkali soil, soil amendment, cotton, yield, plant growth

CLC Number:

S156.4+9

ZHOU Xianlin, QIN Qin, MENG Yongming, WANG Long, HU Chengcheng, ZHU Haiyong, LAI Bo. Effects of Different Amendments on Saline-alkali Soil Improvement and Cotton Growth in Xinjiang[J]. Chinese Agricultural Science Bulletin, 2022, 38(34): 91-96.

Figures/Tables 9

References 25

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项目	盐分/(g/kg)	pH	离子组成/(g/kg)
项目	盐分/(g/kg)	pH	CO₃^2-	HCO₃^-	Cl^-	SO₄^2-	Ca²⁺	Mg²⁺	K⁺	Na⁺
测定值	3.34	8.16	0	0.6676	0.4107	1.6685	0.4178	0.0949	0.0558	0.5934

项目	盐分/(g/kg)	pH	离子组成/(g/kg)
项目	盐分/(g/kg)	pH	CO₃^2-	HCO₃^-	Cl^-	SO₄^2-	Ca²⁺	Mg²⁺	K⁺	Na⁺
测定值	3.34	8.16	0	0.6676	0.4107	1.6685	0.4178	0.0949	0.0558	0.5934

处理	土壤改良剂	用量/(kg/hm²)
CK	空白	0
Y	盐碱专家	30
L	磷酸脲	30
W	微力壮	30

处理	土壤改良剂	用量/(kg/hm²)
CK	空白	0
Y	盐碱专家	30
L	磷酸脲	30
W	微力壮	30

处理	出苗率/%	株高/cm
CK	0.625±0.035c	3.11±0.160b
Y	0.747±0.019a	4.42±0.288a
L	0.682±0.012b	3.15±0.032b
W	0.742±0.022a	3.63±0.426b