کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4381857 1617785 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Responses of soil micro-food web to long-term fertilization in a wheat–maize rotation system
ترجمه فارسی عنوان
پاسخ به وب سایت میکرو مواد غذایی خاک به منظور کاشت طولانی مدت در سیستم چرخش گندم
کلمات کلیدی
جامعه میکروبی، جامعه نماتودها، باروری بلند مدت، راندمان متابولیک، مدل سازی معادلات ساختاری، چرخش گندم-ذرت
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی


• Crop straw incorporation promoted the accumulation of the fungal biomass carbon.
• Crop straw incorporation enhanced the carbon resource flow into the soil food web.
• Long-term inorganic fertilization had a negative effect on fungivorous nematodes.
• The bottom–up control in the soil food web was significant in the wheat season.

Soil microbes and nematodes are important components of soil biota that strongly affect agricultural productivity and sustainability. Currently, our knowledge on the response of soil biota to agricultural management is restricted. This study aimed to identify the relationship between microbial and nematode communities and explore the resource path that flows within the soil micro-food web under different fertilization practices in a winter-wheat/summer-maize rotation system. The experiment was a randomized complete block design with three replicates for each treatment that included unfertilized control; inorganic N, P and K fertilizer (NPK); NPK plus manure; and NPK plus maize straw. Soil samples were taken at a 0–20 cm depth when wheat and maize were harvested. The results showed that organic manure or maize straw combined with NPK fertilizers had positive effects on the soil microbial and nematode communities. For example, the incorporation of straw increased the fungal biomass. Long-term inorganic fertilization might restrain nematode biomass accumulation especially in fungivorous nematodes. The analysis of the metabolic footprints of nematodes suggested that the incorporation of straw could enhance the carbon resource flow into the soil food web by enhancing nematode biomass. Structural equation modeling analysis suggested that the bottom–up control from the microbial community to the nematode community was more obvious in the wheat season in comparison with the maize season. In addition, a relatively stronger predation relationship was found between omnivores–predators and bacterivores rather than fungivores. Our study suggests that organic management combined with NPK fertilization could effectively enhance the association between microbial and nematode communities, while a crop rotation system with maize may have a negative influence on the structure of the soil micro-food web.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Soil Ecology - Volume 98, February 2016, Pages 56–64
نویسندگان
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