Investigating Verticillium wilt occurrence in cotton and its risk management by the direct return of cotton plants infected with to the field.

Verticillium wilt is one of the most crucial diseases caused by that threatens the cotton industry. Statistical results showed that the return of cotton plants infected with to the field might be an essential cause of the continuous aggravation of cotton Verticillium wilt. The correlation among the cotton plants infected with returning to the field, the occurrence of Verticillium wilt, and the number of microsclerotia in rhizosphere soil need further investigation.

[Element Geochemistry of Lake Sediments from L07-10 in the “Great Ear” Area of Lop Nur and Its Significance for Climate Variation Change with ICP-OES].

Spectral analysis techniques were applied to geochemical element analysis to provide additional environmental data about evolution of salt lakes and climate change. The elements composition of lake sediments from L07-10 in the “Great Ear” Area of Lop Nur was analyzedby using Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES )and from 14 C carbon dating by using the EN accelerator mass spectrometry (AMS).This paper estimated the climate change in this region since 16.

[Analysis of chemical speciation of heavy metals in L07-11 profile sediments of "Big Ear" Region of Lop Nor Lake].

As playa is the typical characteristic in "Big Ear" Region of Lop Nor Lake, it is significant for enriching playa heavy metal earth environmental chemical data by analyzing species distribution of heavy metal among this district. In this thesis, heavy metal Cd, Pb, Ni, Cu in L07-11 Profile Sediments of "Big Ears" Region of Lop Nor Lake are considered as research objects. Tessier sequential extraction and Graphite furnace atomic absorption method (GF-990) are used to discuss and analyze five forms of Cd, Pb, Ni, Cu among sediments.

[Measuring soil water content by using near infrared spectral characteristics of soil].

Different textured soils (sandy loam, silty clay loam and clay) from Manas County, Xinjiang were researched with indoor spectral reflectance, continuum removal was used to process soil spectra curve, and correlation analysis was made about normalized spectral reflectance and water content for modeling. The results show that different textured soils have reflectance in a order that clay>silty clay loam>sandy loam; the critical points of field capacity in sandy loam, silty clay loam and clay were 20.01%, 24.

The effects of drying following heat shock exposure of the desert moss Syntrichia caninervis.

Desert mosses are components of biological soil crusts (BSCs) and their ecological functions make assessment and protection of these mosses a high-ranking management priority in desert regions. Drying is thought to be useful for desert mosses surviving heat shock. In this study, we investigated the role of drying by monitoring the responses of physiological characters and asexual reproduction in the typical desert moss Syntrichia caninervis.