文献类型： 外文期刊

作者： Zhong Shuang ¹ ; Zeng Huicai ³ ; Jin Zhiqiang ¹ ;

作者机构： 1.Chinese Acad Trop Agr Sci, Haikou Expt Stn, Haikou 570102, Peoples R China

2.Hainan Key Lab Banana Genet Improvement, Haikou 570102, Peoples R China

3.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 570102, Peoples R China

关键词： crop rotations;enzymatic activities;microbial biomass;monoculture;soil chemical properties

期刊名称：PEDOSPHERE （ 影响因子：3.911； 五年影响因子：4.814 ）

ISSN： 1002-0160

年卷期： 2015 年 25 卷 6 期

页码：

收录情况： SCI

摘要： Soil microbiological and biochemical properties under various field crop rotations such as grains, pastures and vegetables have been studied intensively under short-term period. However, there is limited information about the influence of banana-based rotations on soil organic C, total N (TN), microbial biomasses and enzyme activities under long-term crop rotations. A field experiment arranged in a randomized complete block design with three replicates was carried out at the Wanzhong Farm in Ledong (18 degrees 37'-18 degrees 38' N, 108 degrees 46'-108 degrees 48' E), Hainan Province, China, to compare the responses of these soil parameters to long-term (10-year) banana (Musa paradisiaca)-pineapple (Ananas) rotation (AB), banana-papaya (Carica) rotation (BB) and banana monoculture (CK) in a conventional tillage system in the Hainan Island. Soil pH, total organic C (TOC), dissolved organic C (DOC), TN, total P (TP) and available P (AP) were found to be significantly higher (P < 0.01) in AB and BB than CK at 0-30 cm soil depth. Microbial biomass C (MBC) and N (MBN) were observed 18.0%-35.2% higher in AB and 8.6%-40.5% higher in BB than CK at 0-30 cm. The activities of urease (UA), invertase (IA), dehydrogenase (DA) and acid phosphatase (APA) showed a mean of 21.5%-59.6% increase in AB and 26.7%-66.1% increase in BB compared with CK at 0-30 cm. Higher pH, TOC and DOC at 0-10 and 10-20 cm than at 20-30 cm were obtained despite of the rotations. Soil MBC and MBN and activities of UA, IA and DA decreased markedly (P < 0.01) with increasing soil depth in the different rotation soils. as well as the monoculture soil. In general, soil microbial biomass and enzymatic activities were more sensitive to changes in banana-based rotations than soil chemical properties, and consequently they were well-established as early indicators of changes due to crop rotations in the tropics.