Effects of Combined Application of Cow Manure and Desulfurized Gypsum on Coastal Saline Soil and Growth of Wheat

doi:10.11924/j.issn.1000-6850.casb2024-0016

Abstract

Abstract:

To investigate the effect of combined application of livestock manure and desulfurized gypsum on improving coastal saline-alkali soil, this study used coastal saline-alkali soil in Jinghai District, Tianjin as the experimental object. Through setting up field plot experiments, the effects of different application rates of cow manure and desulfurized gypsum on soil pH, total salt, soil ion composition, wheat plant height, 1000-grain weight, number of grains per spike and yield were analyzed to provide technical reference for the treatment of coastal saline-alkali land. The results showed that all 9 different combinations of desulfurized gypsum and cow manure could reduce soil pH, with LDLG, LDMG and LDHG treatments having the best effect, reducing pH by 2%-5%. Compared with the ion composition of CK, under the same application amount of cow manure, the contents of Na⁺, HCO^3- and Cl^- in LDLG, LDMG and LDHG were significantly reduced, while the contents of K⁺, SO₄^2-, Mg²⁺ and Ca²⁺ showed increasing trends. Na⁺ decreased by 15.71%-24.21% compared with CK; Ca²⁺ increased by 110.69%-880.67%. Mg²⁺ increased by 133.41%-525.31%; HCO^3- decreased by 22.91%-59.01%; Cl^- decreased by 35.51%-48.22%; K⁺ increased by 16.41%-70.02%; SO₄^2- increased by 123.21%-351.19%, and SAR value decreased by 65.59%-89.81%. The application of desulfurized gypsum and cow manure could significantly increase wheat plant height and yield, with plant height increasing by 4.78%-14.79%, and HDLG treatment reaching the maximum plant height of 64.67 cm; yield increased by -11.37%-19.55%, reaching the maximum value in LDMG. The study showed that the amount of desulfurized gypsum was significantly positively correlated with soil total salt content, and the amount of desulfurized gypsum and cow manure was significantly negatively correlated with soil pH. Under a fixed amount of cow manure, the soil total salt content showed an increasing trend with the increase of desulfurized gypsum application; under a fixed amount of desulfurized gypsum, the soil total salt content decreased with the increase of cow manure application.

Key words: desulfurized gypsum, cow dung, coastal saline-alkali land, soil improvement, wheat

ZHANG Keyi, XIAO Hui, TIAN Xiuping, ZHANG Hui, CHENG Wenjuan, PAN Jie, DONG Yuchen. Effects of Combined Application of Cow Manure and Desulfurized Gypsum on Coastal Saline Soil and Growth of Wheat[J]. Chinese Agricultural Science Bulletin, 2024, 40(30): 66-74.

Figures/Tables 8

References 38

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处理	离子
处理	K⁺	HCO₃^-	Mg²⁺	Cl^-	Ca²⁺	Na⁺	SO₄^2-
CK	0.187±0.02b	0.350±0.01a	0.390±0.03d	1.545±0.09a	0.515±0.03d	3.337±0.08a	0.979±0.03d
LDLG	0.217±0.02b	0.270±0.04b	0.909±0.05c	0.996±0.03b	1.085±0.09c	2.530±0.10c	2.184±0.15c
LDMG	0.299±0.01a	0.160±0.01c	2.029±0.04b	0.883±0.02bc	4.064±0.06b	2.756±0.06b	4.060±0.19b
LDHG	0.317±0.02a	0.143±0.02c	2.437±0.10a	0.800±0.01c	5.053±0.04a	2.814±0.05b	4.417±0.07a

处理	离子
处理	K⁺	HCO₃^-	Mg²⁺	Cl^-	Ca²⁺	Na⁺	SO₄^2-
CK	0.187±0.02b	0.350±0.01a	0.390±0.03d	1.545±0.09a	0.515±0.03d	3.337±0.08a	0.979±0.03d
LDLG	0.217±0.02b	0.270±0.04b	0.909±0.05c	0.996±0.03b	1.085±0.09c	2.530±0.10c	2.184±0.15c
LDMG	0.299±0.01a	0.160±0.01c	2.029±0.04b	0.883±0.02bc	4.064±0.06b	2.756±0.06b	4.060±0.19b
LDHG	0.317±0.02a	0.143±0.02c	2.437±0.10a	0.800±0.01c	5.053±0.04a	2.814±0.05b	4.417±0.07a

方程：Z=Z0+ax+by+cx²+dy+fxy
Z0	292.28267±16.47248
a	-1.99082±2.47769
b	5.81882±3.98296
c	-0.01168±0.04394
d	-0.19641±0.10732
f	0.07199±0.04793

方程：Z=Z0+ax+by+cx²+dy+fxy
Z0	292.28267±16.47248
a	-1.99082±2.47769
b	5.81882±3.98296
c	-0.01168±0.04394
d	-0.19641±0.10732
f	0.07199±0.04793