摘要: |
为促进农业废弃物料的循环利用, 选用秸秆(CS)、猪粪(PM)、酒渣(WR)、沼渣(BR)和菌渣(MR)5种来源于不同系统的农业废弃物料进行等碳量还田, 外设单施无机肥(CF), 不施肥(CK)以及裸地(CF)3个处理。测定了土壤水稳性团聚体、大团聚体包裹的微团聚体、土壤总有机碳(TOC)、全N以及团聚体结合态有机碳、N含量, 以探讨农业有机废弃物料还田对土壤团聚体结构的稳定性以及土壤C、N的影响。与无机肥处理相比, 有机物料还田分别使土壤大团聚体(Ma:0.25~8 mm)、微团聚体(Mi:0.053~0.25 mm)以及大团聚体包裹的微团聚体(Mm:0.053~0.25 mm)含量平均增加34%、 8%和34%, 土壤团聚体平均重量直径(MWD)提高20%, 土壤TOC含量平均增加61%, 全N含量增加45%。其中以猪粪和酒渣最有利于团聚体以及土壤TOC、N含量的增加, 沼渣效果最差。总体上有机物料还田促进了团聚体的形成和稳定, 增加土壤TOC与N浓度, 提高了团聚体对TOC和N的保护。 |
关键词: 农业废弃物料 土壤团聚体 有机碳 全N |
DOI:10.11841/j.issn.1007-4333.2014.06.15 |
投稿时间:2014-02-21 |
基金项目:国家科技支撑计划循环农业工程项目(2011BAD16B15, 2012BAD14B03) |
|
Effects of agricultural organic wastes incorporation on soil water-stable aggregates and C, N contents |
LONG Pan, GAO Wang-sheng, SUI Peng, YAN Ling-ling, CHEN Yuan-quan
|
(College of Agronomy and Biotechnology/Circular Agriculture Research Center, China Agricultural University, Beijing 100193, China) |
Abstract: |
Recycling use of agricultural organic wastes resources becomes a big challenging task.In this study, five organic wastes including crop straw (CS), pig manure (PM), wine residue(WR), biogas residue(BR) and mushroom residue (MR) were applied in a field test.Mineral fertilizer (CF), none input (CK) and fallow (FL) were used as controls. Soil water-stable aggregates, microaggregate inside macroaggregates (Mm:0.053-0.25 mm), total organic C(TOC) and N were all measured. The results showed that organic wastes enhanced soil macroaggregates (Ma:0.25-8 mm) by 34%, microaggregates (Mi:0.053-0.25 mm) by 8%, Mm by 34, and the mean weight diameter (MWD) by 20% on average compared with CF. The TOC and N were improved by 61% and 45% as well.The PM and WR of the organic wastes had better bu BR lowest impacts.As a whole, organic wastes' incorporation promoted soil aggregation and stabilization, and enhanced TOC and N contents. |
Key words: agricultural organic wastes soil aggregates TOC total N |