期刊
APPLIED CLAY SCIENCE
卷 109, 期 -, 页码 68-75出版社
ELSEVIER
DOI: 10.1016/j.clay.2015.02.001
关键词
Encapsulation; R. planticola Rs-2; Bentonite; Alginate; Slow release
资金
- National Natural Science Foundation of China [31260022]
- Science and Technology Fund Projects of Shihezi University [2013ZRKXIJQ01]
Raoultella planticola Rs-2 was innovatively encapsulated with sodium bentonite and alginate (NaAlg) composites to develop efficient slow-release biofertilizer formulations and minimize production costs. These microcapsules were spherical in shape and their encapsulation efficiency was nearly 100%. Approximately 88.9% of Rs-2 in dried microcapsules of bentonite-NaAlg survived after 6 months of storage. The NaAlg amount required to produce desirable bentonite-blended Rs-2 microcapsules was significantly lower than that of single NaAlg. Swelling, biodegradability, and release rate increased with increasing NaAlg content and decreased with increasing bentonite content. All release curves of bacteria from the bentonite-NaAlg microcapsules presented an initial burst followed by a gradual increase manner, which mainly implied the release behavior followed a first-order release model. Thus, bentonite-NaAlg composites could be ideal low-cost encapsulated wall materials for slow-release bacterial fertilizers in farmlands. (C) 2015 Elsevier B.V. All rights reserved.
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