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Northeast Forestry University (2004)

The Manufacture of the Biological Active Water Retention Agent and Its Application in Desertilized Soil

丰绪霞;

Titre : The Manufacture of the Biological Active Water Retention Agent and Its Application in Desertilized Soil

Auteur : 丰绪霞;

Grade : Master’s Theses 2004

Université : Northeast Forestry University

Résumé
This paper mainly deals with the technological process of the biological active water retention agent’s production, and analyzes the arid soil. In order to make clear this kind of water retention agent’s effect on desert soil, the core of stalks will be made into cellulose, which can absorb water efficiently. At the same time a multitude of simple fungi and compounding ones will be applied here and made into this kind of agents. The fittest biological active water retention agent will come out after the close measurement of the various degradation rates and the analysis of degradation conditions required during the degradation process. Besides, the optimal degradation condition will be reached with temperature 50℃, content of water in fiber 60%, and the inoculation of fungi used for fiber degradation process 1%. In addition, the outcome of the degradation process will be analyzed, too.The optimal biological active water retention agents, which have been selected, will be put to test in evaporation rate and maximal water holding capacity. Through the application of water retention agents, the evaporation rate of soil will be reduced, at the same time the water holding capacity increased. The water retention agents with different concentration range will be applied to 6 kinds of simulated soil indoors. The agents, which differ in concentration, will be compared in terms of their effectiveness through the testing of different agents’ effect upon vegetation’s biomass, chlorophyll content, specific gravity of soil, bulk weight, void fraction, enzyme peroxides’ activeness in soil, and the amount of microorganisms in soil. The optimal concentration will prove to be 200 g/m3 in the simulated desertification soil.To examine the effectiveness of the selected agents’ performance in desert soil’s improvement, in this paper the agents will be matched with 4 kinds of concentration, then together with carboxyl cellulose and nutritive water retention agents which also differ in concentration , they will be applied to the two-year born Japanese larch seedlings to analyze their growing power. Thereby the optimal applied compounding in production will be found out .The paper will end with such a conclusion : the biological active water retention agents made of corn canes through degradation have the function of holding water, as well as bettering the desert soil’s physicochemical properties and vegetation’s physiological target. The outlook of this kind of agents in production is promising.

Mots clés : water retention agents; desertification; cellulose; super-absorbing polymer; microorganism;

Présentation (CNKI)

Page publiée le 25 septembre 2017