有机物料输入对果园土壤水稳性团聚体形成过程影响研究

Impact of Soil Amendments on Water-stable Aggregate Formation in an Orchard Soil

有机物料输入是改良土壤结构的有效方式。本研究通过室内实验研究了无添加对照、添加粪肥包括猪粪肥和牛粪肥、玉米秸秆和大豆秸秆处理下对多年果园板结土壤水稳性大团聚体产量及其形成速率的变化。结果表明,猪粪肥能够显著提高土壤大团聚体含量,牛粪肥对土壤大团聚体产量的提升效果并不显著;高剂量和低碳氮比秸秆输入能够更好地促进土壤水稳性大团聚体的形成。本研究能够为运用有机物料作为管理工具,提升多年果园土壤有机碳含量、水稳性团聚体结构水平等功能提供数据支撑。

The input of organic materials is an effective way to improve soil structure.This study investigated the changes in the yield and formation rate of water-stable aggregates in long-term orchard compacted soil under indoor experimental conditions with treatments including no addition,addition of manure including pig manure compost and cattle manure compost,corn stover,and soybean stover.The results showed that pig manure significantly increased the content of soil aggregates,while the effect of cattle manure on the yield of soil aggregates was not significant.High-dose and low C/N ratio straw inputs were better at promoting the formation of water-stable aggregates in soil.This study provides data support for the use of organic materials as management tools to improve soil organic carbon content and the level of water-stable aggregate structure in long-term orchard soils.