|Table of Contents|

Effects of Soil Respiration Intensity and Soil Aggregate Organic Carbon Distribution on Straw Returning in Brown Earth

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年11
Page:
97-103
Research Field:
Publishing date:

Info

Title:
Effects of Soil Respiration Intensity and Soil Aggregate Organic Carbon Distribution on Straw Returning in Brown Earth
Author(s):
LI Jie1; 2; LIU Hui1; DONG Jingchao1; WANG Jiqiong1; ZHANG Dageng1
(1.College of Land and Environment,Shenyang Agricultural University,Liaoning,Shenyang 110866;2.Key Laboratory of Original Agro-environment Quality of Ministry of Agriculture/Tianjin Key Laboratory of Agro-environment and Safe-product,Tianjin 300000)
Keywords:
straw returning; soil respiration; soil aggregate
PACS:
-
DOI:
10.11937/bfyy.20183194
Abstract:
Maize and rice straws were selected as target materials and a cultivating experiment was conducted to investigate the effects of straw returning on soil respiration intensity and soil aggregate organic carbon distribution in Brown Earth.The results showed that maize and rice straws addition could significantly increase the soil respiration,and the soil respiration intensity and the cumulative release of CO2 increased with the amount of straw addition in soil.Before the 180 days of the cultivating experiment,straw addition had no significant effect on the formation of larger soil stable aggregates with the increase of incubation time.Small aggregate formed large aggregate after straw addition.However,the straw addition would inhibited the formation of soil aggregates when the amount of straw addition exceed 7.5%.In control treatment,soil organic carbon transferred from large aggregates to micro aggregates.The soil organic carbon (SOC) content increased in the large soil aggregate after maize and rice straw were added,and SOC increased with the increased amount of straw additon in soil.In the early stage of the cultivating experiment,rice straw significantly increased the SOC in soil.After 270 days of cultivation,the promoting effect was more noticeable in maize straw addition treatment than that of the rice straw treatment.

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Last Update: 2019-07-09