[Effects of economic fruit forest planting on the stability of red soil aggregates in the subtropical hilly area].

The stability of aggregates is of great significance to evaluate water and soil environment in regions plan-ting economic fruit forest. We explored the effects of economic fruit forest types on the structure and stability of soil aggregates in the 0-50 cm soil layer from 5-year-old , , , and forests in the hilly area in northern Hunan. The content, distribution characteristics and stability indices of soil aggregates from each economic fruit forest were quantitatively analyzed by the Shavinov method.

[Effects of interplanting on soil aggregate distribution and stability in economic orchard at hilly slope red soil of southern China].

We investigated the effects of interplanting on soil aggregate distribution and stability of red soil in economic orchard in a new-constructed slope land, based on 12 kiwifruit planting experi-mental plots with a slope of about 12°, a length of 18 m, and a width of 1.5 m. Three types of interplanting patterns were implemented by interplanting purple sweet potato (PSP), hairy vetch (HV), and weeds (W) for three years, respectively, taking the bare land with no vegetation as control (CK) to determine the aggregate indicators at 0-15 cm soil layer.