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

冯志珍; 颜宏; 卢雨欣; 徐倩; 白亚妮; 赵文娟

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中国环境科学 ›› 2023, Vol. 43 ›› Issue (10) : 5328-5338.

土壤污染与控制

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

冯志珍^1,2, 颜宏^1,2, 卢雨欣^1,2, 徐倩^1,2, 白亚妮^1,2, 赵文娟^1,2

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Effects of attapulgite-based composites on soil improvement——Take desert-oasis farmland soil as an example

FENG Zhi-zhen^1,2, YAN Hong^1,2, LU Yu-xin^1,2, XU Qian^1,2, BAI Ya-ni^1,2, ZHAO Wen-juan^1,2

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摘要

以黑河中游临泽县荒漠绿洲农田土壤为研究对象，研究凹凸棒石/生物质炭复合材料及其单一组分在不同施用水平下对土壤团聚体和玉米（Zea mays L.）产量的影响.结果表明，复合材料使试验区土壤中石砾（>1mm）、粗砂粒（1~0.25mm）、细砂粒（0.25~0.1mm）、级细沙粒（0.1~0.05mm）含量降低，粗粉粒（0.05~0.02mm）、细粉粒（0.02~0.002mm）、黏粒（<0.002mm）含量升高；随着复合材料施用量的增加，>2mm粒级团聚体含量逐渐升高，土壤团聚体平均重量直径（MWD）逐渐增加，当达到高施用水平（12t/hm²）时，MWD为6.24mm，比对照处理增加了49.6%；玉米产量随着复合材料施用量的增加呈现先增加后减少的变化趋势，当处于中施用水平（8t/hm²）时，产量达到18352kg/hm²，与对照相比增产56.9%.综合分析可知，复合材料一方面通过调控土壤颗粒组成与分布，促进土壤团粒结构形成，改善土壤结构，影响土壤物理性质；另一方面，复合材料自身带来的养分物质，会影响土壤化学性质.施用复合材料后通过土壤理化指标的改变，提高了玉米产量，其对荒漠绿洲农田土壤的改良效果优于其单一组分，具有较好的开发利用价值.

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.

导出引用

冯志珍, 颜宏, 卢雨欣, 徐倩, 白亚妮, 赵文娟. 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[J]. 中国环境科学. 2023, 43(10): 5328-5338

FENG Zhi-zhen, YAN Hong, LU Yu-xin, XU Qian, BAI Ya-ni, ZHAO Wen-juan. Effects of attapulgite-based composites on soil improvement——Take desert-oasis farmland soil as an example[J]. China Environmental Science. 2023, 43(10): 5328-5338

中图分类号： X53

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