کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5751821 1619710 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of plant-symbiotic relationships on the living soil microbial community and microbial necromass in a long-term agro-ecosystem
ترجمه فارسی عنوان
اثرات روابط گیاهی-همزیستی بر جامعه میکروبی زنده خاک و نکروماس میکروبی در یک درخت زیست محیطی بلند مدت
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- We extracted PLFA and amino sugars from six fertilization treatments under two crops.
- Both, microbial bio- and necromass compositions were shaped by manure addition.
- Short-term effects on microbial biomass result from mineral fertilizers.
- Strength of mineral fertilizer effects depends on crop type and plant-symbionts.
- Turnover of microbial necromass may depend on N fertility.

We examined the impact of arbuscular mycorrhizal fungi and rhizobia on the living microbial community and microbial necromass under different long-term fertilization treatments at the long-term Static Fertilization Experiment Bad Lauchstädt (Germany). Phospholipid fatty acids (PLFA) and amino sugars plus muramic acid, were used as biomarkers for soil microbial bio- and necromass, respectively, and analyzed from six treatments imposed on two crop rotations, varying only in the inclusion/non-inclusion of a legume. Treatments included: two levels of only farmyard manure (FYM), only mineral fertilizer (NPK), the combined application of both fertilizer types and a non-fertilized control. PLFA profiles differed clearly between the investigated crop rotations and were significantly related to labile C, mineral N, and soil pH. This emphasizes the role of carbon, and of mycorrhizal and rhizobial symbioses, as driver for changes in the microbial community composition due to effects on the living conditions in soil. We found some evidence that legume associated symbiosis with arbuscular mycorrhizal fungi and rhizobia act as a buffer, reducing the impact of varying inputs of mineral nutrients on the decomposer community. While our results support former findings that living microbial populations vary within short-term periods and are reflective of a given crop grown in a given year, soil necromass composition indicates longer term changes across the two crop rotation types, mainly shaped by fertilizer related effects on the community composition and C turnover. However, there was some evidence that specifically the presence of a legume, affects the soil necromass composition not only over the whole crop rotation but even in the short-term.

195

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 581–582, 1 March 2017, Pages 756-765
نویسندگان
, , , , , ,