凹凸棒石基复合材料土壤改良效果研究——以荒漠绿洲农田土壤为例

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Abstract Effects of attapulgite/biochar composite and its individual component on soil aggregate and corn (Zea mays L.) yields at different application levels were studied in desert-oasis farmland soil in Linze County, middle reaches of Heihe River. Results showed that the composite reduced the gravel particles (>1mm), coarse sand particles (1~0.25mm), fine sand particles (0.25~0.1mm), and grade fine sand particles (0.1~0.05mm), while increasing the coarse silt particles (0.05~0.02mm), fine silt particles (0.02~0.002mm) and clay particles (<0.002mm). The soil aggregate content of >2mm and the average weight diameter (MWD) were gradually increased with an increase in the application dosage of composite. When the application dosage of composite reached a high level(12t/hm²), the MWD reached the maximum of 6.24mm, which increased 49.6% comparing to the control treatments. With the increasing application dosage of composite, corn yields firstly increased and then decreased. When medium application dosage was applied(8t/hm²), the yield reached 18352kg/hm², increased 56.9% comparing with the control treatment. To conclude, the attapulgite/biochar composite promoted the formation of soil aggregate structure by regulating soil particle distribution, and further improved soil structure and physicochemical properties. On the other hand, the nutrients of the composite affected the soil chemical properties. The corn yields were increased by the change of soil physicochemical properties after applying attapulgite/biochar composite. The composite had greater effect than individual in improvement of farmland soil in desert-oasis, had better development and utilization value.

Key words： attapulgite/biochar composite desert-oasis particle distribution aggregate corn yields

Received: 18 April 2023

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	FENG Zhi-zhen
	YAN Hong
	LU Yu-xin
	XU Qian
	BAI Ya-ni
	ZHAO Wen-juan

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FENG Zhi-zhen,YAN Hong,LU Yu-xin等. Effects of attapulgite-based composites on soil improvement——Take desert-oasis farmland soil as an example[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5328-5338.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I10/5328

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