<UnorderedList Mark="Bullet"> <ItemContent> Shelter forests in the agricultural field can increase forest productivity, improve soil fertility and achieve better ecological benefits. </ItemContent> <ItemContent> The amoA and nirS genes, which played vital roles in the changes of soil nutrients concentration indiced that Larix gmelinii forest was used as the most suitable shelter forests to enhance soil nutrients, which accelerated soil nutrients cyclic utilization. </ItemContent> <ItemContent> It provided a clear evidence for importance of the microbial-abundance in the soil N cycle sequestration. </ItemContent> </UnorderedList>As an essential base for agricultural products in Baiquan County China, the black soil in the Northeast region had soil nutrient contents up to several times that of ordinary soil. However, over-exploitation and utilization in recent years led to a decline in the quality of black soil. Therefore, it is strategic significance to study the improvement of soil quality by different shelterbelts. In order to explore the interaction between soil microbial and nutrients, the soils under four shelterbelts (pure Pinus sylvestris forest, pure Larix gmelinii forest, mixed Pinus sylvestris forest and mixed Larix gmelinii forest) were used as the research materials in Baiquan County, Heilongjiang Province, China. The changes of soil physicochemical properties and soil microbial function genes were studied, and their interaction patterns were analyzed by Redundancy analysis (RDA). The results showed that the concentration changes of TOC (total organic carbon), TN (total nitrogen), NO<Stack> 3 − </Stack>-N (nitrate nitrogen concentration), NH<Stack> 4 + </Stack> -N (ammonium nitrogen), TP (total phosphorus) and SP (soil available phosphorus) were significantly (P < 0.05) increased in rhizosphere soil under mixed Larix gmelinii forest. In non-rhizosphere soil, the concentration changes of TOC, TN, NO<Stack> 3 − </Stack>-N and AN (soil alkali hydrolyzed nitrogen) were significantly (P < 0.05) increased under mixed Larix gmelinii forest. In a word, the concentration changes of TOC, TN, NO<Stack> 3 − </Stack>-N were significantly (P < 0.05) increased in soil under mixed Larix gmelinii forest. In cropland soil, the concentration changes of NO<Stack> 3 − </Stack>-N, NH<Stack> 4 + </Stack>-N, TP and SP were significantly (P < 0.05) increased besides pure Pinus sylvestris forest. The abundance analysis of soil function genes revealed that amoA-AOA, nifH, nirS, nosZ, narG and phoD were upregulated under the mixed Larix gmelinii forest. The changes in abundance of amoA-AOA and nirS played an important role in increasing soil nutrient concentration and promoting the utilization of soil nutrients. The study suggested the cropland soil quality was improved by the mixed Larix gmelinii forest, it should provide clear evidence for importance of the microbial-abundance in the soil nutrients improvement.

Study on soil microbial interaction with nutrients under different shelterbelts in Baiquan County

期刊论文
发表日期：

2025年3月26日

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Jing Yang,
QianRu Ji,
Ye Zhang,
XiaoQing Tang,
Ying Zhang,
Siqiu Xiao,
Zhonghua Tang,
Dewen Li,
Ying Liu

摘要

Shelter forests in the agricultural field can increase forest productivity, improve soil fertility and achieve better ecological benefits.

The amoA and nirS genes, which played vital roles in the changes of soil nutrients concentration indiced that Larix gmelinii forest was used as the most suitable shelter forests to enhance soil nutrients, which accelerated soil nutrients cyclic utilization.

It provided a clear evidence for importance of the microbial-abundance in the soil N cycle sequestration.

As an essential base for agricultural products in Baiquan County China, the black soil in the Northeast region had soil nutrient contents up to several times that of ordinary soil. However, over-exploitation and utilization in recent years led to a decline in the quality of black soil. Therefore, it is strategic significance to study the improvement of soil quality by different shelterbelts. In order to explore the interaction between soil microbial and nutrients, the soils under four shelterbelts (pure Pinus sylvestris forest, pure Larix gmelinii forest, mixed Pinus sylvestris forest and mixed Larix gmelinii forest) were used as the research materials in Baiquan County, Heilongjiang Province, China. The changes of soil physicochemical properties and soil microbial function genes were studied, and their interaction patterns were analyzed by Redundancy analysis (RDA). The results showed that the concentration changes of TOC (total organic carbon), TN (total nitrogen), NO ₃ ⁻ -N (nitrate nitrogen concentration), NH ₄ ⁺ -N (ammonium nitrogen), TP (total phosphorus) and SP (soil available phosphorus) were significantly (P < 0.05) increased in rhizosphere soil under mixed Larix gmelinii forest. In non-rhizosphere soil, the concentration changes of TOC, TN, NO ₃ ⁻ -N and AN (soil alkali hydrolyzed nitrogen) were significantly (P < 0.05) increased under mixed Larix gmelinii forest. In a word, the concentration changes of TOC, TN, NO ₃ ⁻ -N were significantly (P < 0.05) increased in soil under mixed Larix gmelinii forest. In cropland soil, the concentration changes of NO ₃ ⁻ -N, NH ₄ ⁺ -N, TP and SP were significantly (P < 0.05) increased besides pure Pinus sylvestris forest. The abundance analysis of soil function genes revealed that amoA-AOA, nifH, nirS, nosZ, narG and phoD were upregulated under the mixed Larix gmelinii forest. The changes in abundance of amoA-AOA and nirS played an important role in increasing soil nutrient concentration and promoting the utilization of soil nutrients. The study suggested the cropland soil quality was improved by the mixed Larix gmelinii forest, it should provide clear evidence for importance of the microbial-abundance in the soil nutrients improvement.