Research Progress

• A Temporal Stability Analysis of Surface Soil Water Content on Two Karst Hillslopes in Southwest China

  A team in the Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA) used the temporal stability analysis to upscale point-scale measurements to represent mean areal SWC on two typical karst hillslopes.

  Nov 15, 2016
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  Belowground C Allocation by Rice and Turnover of Organic Matter Pools and Microbial Groups Depending on Nitrogen Level

  the research group from the Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA) performed 13C-CO2 continuous labeling (18 days) of rice plants grown in a paddy system under a range of N fertilization rates during the rice vegetative growth period (including the entire tillering stage. They hypothesized that first N fertilization increases total plant biomass and, as a result, increases belowground C allocation through the release of C from rice roots into the soil, second, rhizodeposit-C utilization by microbial groups depends on N fertilization because N availability affects microbial community structure and rhizodeposit composition, and third rhizodeposited-C in paddy soils is used mainly by bacteria because rice over-flooding and oxygen limitation negatively affects fungi.

  Nov 11, 2016
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  Photosynthetic Carbon Allocation and Dynamics in Rice-soil System Varies in Different Soil Organic Carbon: Matthew Effect

  the research group from the Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA) studied the effects of SOC contents on the allocation and dynamics of assimilates by labeling rice with 13CO2 at the rapid root growth stage (tillering stage) and harvested 6 times within 30 days under controlled laboratory condition. The objectives of this study were to determine the allocation and dynamics of new assimilates among pools within the rice-soil systems, and evaluate amounts of C transferred by rice belowground and rhizodeposition under a series of three paddy soils differing widely in SOC content.

  Nov 11, 2016
• Ileal Bacteria Undergoes Gradual Changes Across Animal Development in Grazing Goats

  Researchers in the Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA) employed high-throughput sequencing of 16S rRNA, chemical analysis of volatile fatty acids and fiber-degrading enzyme activities, and statistical techniques to explore age-related changes in ileal bacterial community for grazing goats and their potential roles in host fermentation capacity.

  Oct 25, 2016
• Dietary Protein Levels: is Taking the More the Better?

  a team of researchers from China Agricultural University and the Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA) together conducted a study to investigate the effects of reduced dietary protein levels on the free amino acid profile and mRNA expression of the selected amino acid transceptors in different fiber type of skeletal muscle (longissimus dorsi, psoas major, biceps femoris) of growing pigs.

  Oct 25, 2016
• Decomposition and Priming Effect of Four Different Photosynthesized Carbon in Paddy Soil

  Recently, researchers in the Institute of Subtropical Agriculture,Chinese Academy of Sciences(ISA) employed 13C labelling techniques and two end-member mixing model to investigate the fate and priming effect of organic C from different sources by conducting a 300 days incubation study with four different 13C-labelled substrates: rice shoots (Shoot-C), rice roots (Root-C), rice rhizodeposits (Rhizo-C), and microbe-assimilated C (Micro-C).

  Oct 24, 2016
• Karst Area Has a Rapid Recuperation of Soil Nitrogen Following Agricultural Abandonment in Southwest China

  In order to detect how N status change along with succession, a team of researchers in the Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA) investigated soil N stock and N cycling indicators (e.g.soil dissolved inorganic N concentration, foliar N concentration, 15N of foliar and soil etc.) in cropland, grassland, shrubland, secondary forest and primary forest in a large portion of the karst region in southwest China with the grassland, shrubland and secondary forest developed spontaneously from abandoned cropland.

  Oct 20, 2016
• Alpha-ketoglutarate May Contribute to the Chain of Swine Production

  Recently, researchers in the Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA) used the porcine mammary epithelial cell model in vitro to explore the effect of AKG on lactation performance.

  Oct 17, 2016
• Dissolved Hydrogen Concentrations in Lactating Dairy Cows are Associated with Rumen Fermentation and Microbiota

  Professor Wang Min and his group did an experiment to test the hypothesis that carbohydrates ingested greatly alter the rumen environment in dairy cows, and that dissolved hydrogen concentration is associated with these changes in rumen fermentation and microbiota.

  Oct 12, 2016
• The Effect of Manure Amendment on Soil C Accumulation and Fertilizer N Use was More Effective than Straw Return

  Researchers in the Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA) employed an integrated method to estimate the effect of fertilization on paddy SOC sequestration, based on 106 paired data points from 28 long-term field experiments with double-rice cropping system in subtropical China. The fertilization schemes were selected as chemical fertilizer (NPK), NPK plus straw (NPK+s), and NPK plus manure (NPK+m).

  Oct 12, 2016