|
| Effects of different plastic film mulching treatments on soil microbial communities and enzyme activities in the Weibei drylands of the Loess Plateau |
| Received:June 15, 2020 |
| View Full Text View/Add Comment Download reader |
| KeyWord:film mulching;soil microorganisms;soil enzymes;phospholipid fatty acid(PLFA) |
| Author Name | Affiliation | E-mail | | YU Ya-jun | College of Geography, Shanxi Normal University, Linfen 041000, China | | | ZHANG Hao | College of Geography, Shanxi Normal University, Linfen 041000, China
College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China | | | ZHANG Zi-hao | College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China | | | WANG Cong | College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China | | | WANG Kai | College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China | | | JIANG Rui | College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China | jiangrui@nwsuaf.edu.cn |
|
| Hits: 1371 |
| Download times: 1475 |
| Abstract: |
| The aim of the present study was to investigate the effects of biodegradable/non-biodegradable mulching films and film color (white/black)on soil microbial communities and enzyme activities. Soil microbial biomass, community structure, and enzyme activities, and their interactions with soil physicochemical properties were measured under different film mulching treatments in a corn field in the Weibei drylands of the Loess Plateau using phospholipid fatty acids (PLFA). The following five treatments were evaluated:white nonbiodegradable film mulching (ND-WP), black non-biodegradable film mulching (ND-BP), white biodegradable film mulching (D-WP), black biodegradable film mulching (D-BP), and flat planting without mulching as a control (CK). The results showed that soil temperature, water content, total nitrogen, available nitrogen, and nitrate nitrogen were increased in the two non-biodegradable film mulching treatments than in the two biodegradable film mulching treatments (P<0.05). Between the two biodegradable treatments and the two nonbiodegradable treatments, film color had no effect on soil temperature and soil water content. Additionally, available N, nitrate nitrogen, available P, and available K differed between biodegradable and non-biodegradable film mulching treatments. Following the two nonbiodegradable films mulching treatments, total microbial community, common bacteria, fungi, and gram-positive bacteria PLFAs values were 29.5%, 26.3%, 29.7%, and 58.7% higher (P<0.05)than those following the two biodegradable film mulching treatments, respectively. Urease, alkaline protease, and dehydrogenase activities were also higher in the two non-biodegradable film mulching treatments than in the two biodegradable film mulching treatments (P<0.05). The fungi/bacteria (F/B)ratio averaged 20.6% higher in the two black films mulching treatments than in the two white film mulching treatments, and the gram-positive bacteria/gram-negative bacteria (G+/G-) ratio averaged 27.5% lower in the ND-BP than in the ND-WP treatment. This indicated that the non-biodegradable film mulching was superior to biodegradable film mulching in terms of increasing the microbial biomass and enzyme activity and that black films could improve the stability of soil ecosystems and enhance the soil' s buffering capacity against environmental change. Redundancy analysis showed that the factors influencing soil microbial biomass and enzyme activities were as follows, in descending order:total N, available N, nitrate N, available P, and available K. Soil temperature and water content were not the key limiting factors of soil microbial biomass and enzyme activity. |
|
|
|
