[Activity patterns and foraging behavior of Apis cerana cerana in the urban gardens in winter].

Bees and other pollinating insects are the important parts of biodiversity due to their great role in plant reproduction and crop production. To explore the role of city garden in native bees conservation, activity patterns, visiting behaviors and flowering plants with nectar or pollen were recorded in south Sichuan in winter. The results showed that, worker bees (Apis cerana cerana) were active to collect food out hive under suitable weather conditions, the duration of working was long.

[Soil phosphorus form and fractionation scheme: a review].

As an essential element of plant nutrition, phosphorus plays an important role in the agricultural sustainable development and ecosystem balance. Adopting appropriate soil phosphorus fractionation scheme to study the forms, transformation, and availability of soil phosphorous is critical for understanding soil phosphorus supply and its losses. This paper reviewed the recent researches about the forms of soil inorganic and organic phosphorous, as well as their fractionation schemes and limitations.