不同水分管理方式对稻田土壤生物学特性的影响

摘要/Abstract

摘要： 在下辽河平原单季稻地区研究了常规浅湿干灌溉(CK)、浅湿干灌溉薄膜阻渗(IC)、湿润灌溉薄膜阻渗(MC)、淹水灌溉薄膜阻渗(FC)4种不同水分管理方式下土壤线虫及土壤微生物量的动态变化。结果表明,耙耕前,CK、FC处理食细菌线虫数量显著高于MC、IC处理;薄膜阻渗在黄熟期显著降低了土壤食细菌线虫的数量,在耙耕前显著降低了食真菌线虫数量。潮棕壤稻田食真菌线虫与食细菌线虫相比数量较低。在耙耕前不同水分管理方式下土壤微生物量C显著低于对照。不同水分管理方式在水稻分蘖期、抽穗期对食细菌线虫数量、食真菌线虫数量、微生物量C和微生物量N没有影响。土壤食细菌线虫、食真菌线虫数量与土壤微生物量C、N没有达到显著相关。

关键词: 景观格局, 景观变化, 泰山, 人为干扰

Abstract: Effects of water regimes on soil biological properties were investigated in a field study during a rice (Oryza sativa L.) growing season in the Lower Reaches of Liaohe Plain.The number of bacterial-feeding nematodes at pre-tillage stage was higher in CK and FC than in MC and IC.Percolation-controlling markedly decreased the number of bacterial-feeding nematodes at yellow ripeness stage and that of fungal-feeding nematodes at pre-tillage stage.The number of fungal-feeding nematodes was found to be lower than that of bacterial-feeding nematodes in aquic brown soil.Percolation-controlling significantly decreased soil microbial biomass C at pre-tillage stage.Water regimes exhibited no effects on bacterial-feeding nematodes,fungal-feeding nematodes,microbial biomass Cand microbial biomass Nduring rice tillering and heading stages.No significant correlations were found between the number of bacterial-feeding nematodes,fungal-feeding nematodes and C,N in microbial biomass.

Key words: Landscape pattern, Landscape change, Taishan Mountains, Anthropogenic disturbances

中图分类号:

S511

欧伟, 李琪, 梁文举, 姜勇, 闻大中. 不同水分管理方式对稻田土壤生物学特性的影响[J]. 生态学杂志, 2004, (5): 53-56.

OU Wei, LI Qi, LIANG Wenju, JIANG Yong, WEN Dazhong. Effects of water regimes on soil biological properties in a paddy field[J]. cje, 2004, (5): 53-56.

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