封种后微生物群落对封种的响应随封种时间的变化而变化

IF 2.3 4区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY
Anuoluwapo Ogunleye, Vesh R. Thapa, Deb R. Aryal, Rajan Ghimire, Veronica Acosta-Martinez
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引用次数: 0

摘要

研究了覆盖作物对冬小麦-高粱-豌豆、燕麦和油菜轮作中微生物群落结构的影响;豌豆和燕麦的混合物;豌豆和油菜籽;豌豆、燕麦和油菜籽;豌豆、燕麦、油菜、毛豆、饲料萝卜和大麦6种杂交(SSM)作为cc,休耕作为处理。采用酯链脂肪酸甲酯分析方法,分析了CC终止后(第一阶段)、36天(第二阶段)和一年(第三阶段)土壤微生物群落结构。一期燕麦处理的总微生物量(TMB)显著高于油菜处理47% (p≤0.05)。第二阶段豌豆、豌豆+油菜和SSM下的总菌量为48%,豌豆、油菜及其混合物下的丛枝菌根真菌比休耕时多70% ~ 93%。虽然在终止妊娠后36天和36天后,微生物丰度随CCs而变化,但这些影响不会持续一年。种植后或封种后休耕时间过长不利于微生物群落的繁殖。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Microbial community response to cover cropping varied with time after termination

Microbial community response to cover cropping varied with time after termination

This study evaluates cover crop (CC) effects on microbial community structure in a winter wheat–sorghum–fallow rotation with pea, oat, and canola; mixtures of pea and oat; pea and canola; pea, oat, and canola; and six species mixture (SSM) of pea, oat, canola, hairy vetch, forage radish, and barley as CCs, and fallow as treatments. Soil microbial community structure was analyzed at CC termination (phase I), 36 days (phase II), and a year (phase III) after termination using an ester-linked fatty acid methyl ester analysis. Total microbial biomass (TMB) under oats was significantly greater than under canola (by 47%) in phase I (p ≤ 0.05). The TMB was >48% under pea, pea + canola, and SSM, and arbuscular mycorrhizal fungi was 70%–93% more under pea, canola, and their mixtures than fallow in phase II. While microbial abundance varied with CCs at and after 36 days post-termination, these effects did not persist for a year. Long fallow period after cropping or cover cropping appears detrimental to microbial community proliferation.

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来源期刊
CiteScore
3.70
自引率
3.80%
发文量
28
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