Land-use changes could potentially exert a strong influence on soil quality and soil microbial communities. Moreover, microbial taxa are also important drivers of soil ecological functions. However, the linkage between soil quality and soil microbial communities is in need of deeper understanding. Here, we examined the effects of soil fertility quality on microbial community structure that identified by pyrosequencing and functions that predicted by the FAPROTAX functional annotations dataset after forest conversion to vegetable cropland and tea plantations. Soil quality index was significantly increased after natural forest (0.2) conversion to vegetable cropland (0.7) and tea plantations (0.3–0.6). Soil bacterial beta diversity significantly correlated to soil quality index, but the sensitivity of individual microbial groups varied in response to changes in soil quality. Higher soil quality promoted bacterial diversity in vegetable cropland but decreased it in tea plantations, which implied soil quality was a structural factor in bacterial community composition but had contrasting effects for croplands versus plantations. Agricultural management played a negative role in maintaining microbial interactions, as identified by the network analysis, and furthermore the analysis revealed key functions of the microbial communities. After land-use change, the abundance (e.g., level, intensity) of microbial groups involved in N-cycling increased in tea plantations but decreased in vegetable cropland. The abundance of microbes involved in C-cycling featured an opposite trend. Higher level of N-fixation in tea plantations but the higher abundance of N-oxidation in vegetable cropland was demonstrated. Higher abundance of ammonia-oxidizing bacteria (8.5 × 104 vs. 0.9–2.4 × 104 copies) and ammonia-oxidizing archaea (3.0 × 105 vs. 0.5–1.0 × 105 copies) as identified by qPCR in cropland than that in plantations corroborated the FAPROTAX prediction. Therefore, the key taxa of soil microbial communities and microbial functions were largely dependent on changes in soil quality and determined responses to specific agricultural management.
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CIFOR-ICRAF menerbitkan lebih dari 750 publikasi setiap tahunnya mengenai agroforestri, hutan dan perubahan iklim, restorasi bentang alam, pemenuhan hak-hak, kebijakan hutan dan masih banyak lagi – juga tersedia dalam berbagai bahasa..
CIFOR-ICRAF mendukung dampak ilmiah. Kami melakukan penelitian inovatif, memperkuat kapasitas mitra dan secara aktif terlibat dalam dialog dengan para pemangku kepentingan, menyajikan wawasan termutakhir terkait hutan, pohon, bentang alam, dan masyarakat untuk pengambilan keputusan global.
CIFOR-ICRAF berfokus pada tantangan-tantangan dan peluang lokal dalam memberikan solusi global untuk hutan, bentang alam, masyarakat, dan Bumi kita
Kami menyediakan bukti-bukti serta solusi untuk mentransformasikan bagaimana lahan dimanfaatkan dan makanan diproduksi: melindungi dan memperbaiki ekosistem, merespons iklim global, malnutrisi, keanekaragaman hayati dan krisis disertifikasi. Ringkasnya, kami berupaya untuk mendukung kehidupan yang lebih baik.
CIFOR–ICRAF achieves science-driven impact. We conduct innovative research, strengthen partners’ capacity and actively engage in dialogue with all stakeholders, bringing the latest insights on forests, trees, landscapes and people to global decision making.
CIFOR–ICRAF publishes over 750 publications every year on agroforestry, forests and climate change, landscape restoration, rights, forest policy and much more – in multiple languages.
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