Spatiotemporal response of the optical characteristics of dissolved organic matter to seasonality and land use in tropical island rivers.

Dissolved organic matter (DOM), a pivotal component in the global carbon cycle, plays a crucial role in maintaining the productivity and functionality of aquatic ecosystems. However, the driving factors of variations in the properties of riverine DOM in tropical islands still remain unclear. In this study, the spatiotemporal response of the optical characteristics of riverine DOM to seasonality and land use on Hainan Island in southern China was investigated.

Co-composting with cow dung and subsequent vermicomposting improve compost quality of spent mushroom.

In order to determine a feasible degrading process for spent mushroom (SMS) with high lignin content, the present work used cow dung (CD), SMS, and a mixture of CD and SMS as substrates and evaluated the effects of vermicomposting on the microflora and the quality of composting products. Bacterial (R = 0.548, P = 0.

Conversion of rainforest into agroforestry and monoculture plantation in China: Consequences for soil phosphorus forms and microbial community.

Microbial communities and their associated enzyme activities affect quantity and quality of phosphorus (P) in soils. Land use change is likely to alter microbial community structure and feedback on ecosystem structure and function. This study presents a novel assessment of mechanistic links between microbial responses to land use and shifts in the amount and quality of soil phosphorus (P).

Effect of exogenous abscisic acid on the level of antioxidants in Atractylodes macrocephala Koidz under lead stress.

This study hypothesized that the positive or negative effects of exogenous abscisic acid (ABA) on oxidative stress caused by lead were dose dependent. The effects of different levels of ABA (2.5, 5, and 10 mg L(-1)) on lead toxicity in the leaves of Atractylodes macrocephala were studied by investigating plant growth, soluble sugars, proteins, lipid peroxidation, and antioxidative enzymes.

[Effects of Zanthoxylum bungeanum leaf extract on soil microbe quantity and enzyme activities].

In a pot experiment, the aqueous extract of 10 years old Zanthoxylum bungeanum's leaves was used to water Z. bungeanum seedlings to test its effects on soil microbes and enzyme activities. The results showed that the leaf extract decreased the total amount of microbes and the quantity of bacteria, fungi and actinomyces in rhizosphere soil, but increased the total amount of microbes in non-rhizosphere soil.

[Effect of combined application of bioorganic manure and inorganic nitrogen fertilizer on soil nitrogen supplying characteristics].

Pot experiment was carried out to study the effect of application bioorganic manure on soil nitrogen supplying characteristics. Compared with the application of raw rice straw, a combined application of bio-organic manure and inorganic nitrogen fertilizer could boost the content of microbial biomass carbon and nitrogen, and the increased percentage could be 300-400%. A strong immobilization of nitrogen by microorganisms was always followed by a net N mineralization, which was mostly favorable for the growth and development of plant, and improved the use efficiency of nitrogen fertilizer.