| Effects of water stress under different mulch covers on soil microbial structure and yield in silage maize |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2024.05.17 |
| Key Words: silage maize soil microbial community water stress mulch material yield |
| Author Name | Affiliation | | ZHANG Xiaoyan | College of Water Conservancy and Hydropower Engineering，Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Rui | College of Water Conservancy and Hydropower Engineering，Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WEI Pengcheng | College of Water Conservancy and Hydropower Engineering，Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LI Miaoqi | College of Water Conservancy and Hydropower Engineering，Gansu Agricultural University, Lanzhou, Gansu 730070, China |
|
| Hits: 119 |
| Download times: 114 |
| Abstract: |
| The purpose of this study was to clarify the effects of different water stress and mulch materials on soil microbial community structure of silage maize. From April to October 2022, using ‘Long Silage No.1’ maize as the test material, a two\|factor randomized block field test was conducted to establish three moisture gradients: fully irrigated (D1, 75%~95% θf）（where θf represents the field water holding capacity), mild water stress (D2, 55%~75% θf), and moderate water stress (D3, 35%~55% θf). Additionally, four types of mulching materials were tested: ordinary white mulch film (M1), black ground cloth (M2), biodegradable film (M3), and liquid mulch (M4), resulting in a total of 12 treatments. The study analyzed the effects of water\|membrane interactions on microbial community structure and yield in the inter\|root soil of silage maize. The results indicated that: (1) The D1 treatment significantly increased the inter\|root unique microbial species of silage maize, while the inter\|root unique microbial species in the M4 treatment were significantly higher than those in the other mulching materials. (2) The soil bacteria across all treatments comprised a total of 43 phyla, 109 classes, 285 orders, 439 families, and 735 genera, demonstrating rich diversity, with dominant bacterial groups consistently identified as Ascomycetes (including Proteobacteria, Actinobacteria, and Acidobacteria). (3) Principal Co\|ordinate analysis (PCoA) revealed that the clustering of bacterial community structure was highly consistent with the degree of moisture regulation and deficit. Collectively, these findings suggest that moisture had a more pronounced effect on the diversity of soil microbial communities in the inter\|root zone of maize silage, whereas the impact of mulching materials was comparatively lesser. (4) At D1 level, the yield of fresh grass and hay of silage maize under M3 treatment was significantly increased by 21.58% and 16.59% compared with M4 treatment. Under D2 and D3 treatment, the effect of film coating material on the yield of fresh grass was not significant. Among all treatments, the fresh grass and hay yields of the D2M3 treatment were the largest, increasing by 38.10% and 12.65% respectively compared with D1M1. Considering the goals of soil health and yield benefits, it is feasible to replace M1 or M2 with M3, but M4 has no advantage in yield. In this experiment, the treatment performance of mild water deficit during the whole growth period combined with biodegradable membrane was better. |
|
|
|