Genotype and slope position control on the availability of soil soluble organic nitrogen in tea plantations
作者： S. H. Xing , C. R. Chen , H. Zhang , B. Q. Zhou , Z. M. Nang
DOI: 10.1007/S10533-010-9460-3
关键词:
摘要: Soluble organic nitrogen (SON) plays a vital role in ecosystem N cycling processes and is controlled by number of biotic abiotic factors. We compared soil SON availability, microbial biomass, protease asparaginase activities phospholipids fatty acid (PLFA) profiles at the 0–15 15–30 cm layers 10 year old tea plantations two genotypes—Oolong (Camellia sinensis (L.) O. Kuntze cv. Huangjingui) (designated as ‘OT’) Green (C. Fuyun 6) ‘GT’)—established different slope positions. Concentrations measured 2 M KCl extraction under OT plantation were greater than GT plantation, while concentrations middle (MS) lower (LS) positions upper (US) position. Trends biomass C between genotypes across similar to pools. The fungal-to-bacterial ratios higher US position MS LS plantation. Results from this study support that genotype are key factors controlling availability also imply importance plant traits (e.g. litter quantity chemistry) texture determining overall transformation community composition landscape level.
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