Author Wang Kai Liu Haitao Shu Zhiming
Malondialdehyde; Maximum capillary water holding capacity of POD in tillering stage of Coix lachryma-jobi
Anhui Agricultural Sciences 2007-35-28
ISSN 05 17-66 1 1
College of Life Sciences, Northwest A&F University, Yangling 7 12 100, Shaanxi.
[Objective] The aim was to explore the effects of water at tillering stage on chlorophyll content, POD activity and membrane lipid peroxidation of different Coix lachryma-jobi varieties. [Method] Pot experiment was used to simulate water stress, and the chlorophyll content P, od activity and MDA content of Coix lachryma-jobi leaves at tillering stage were determined. [Result] The effects of water reduction at tillering stage on chlorophyll content and POD activity of different varieties fluctuated. However, when the soil water content reaches 70% of the maximum capillary capacity, POD activity and plant growth are obvious, while MDA content increases with the decrease of water content. [Conclusion] This study provided conditions for realizing high yield, high quality and controllability of Coix lachryma-jobi, and provided certain scientific and theoretical basis for establishing a reasonable GAP irrigation system.
Comparison of chlorophyll peroxidase activity and malondialdehyde content in Coix lachryma-jobi at tillering stage
Study on the relationship between rainfall infiltration and soil erosion on the slope of granite forest land in the Three Gorges of the Yangtze River
Author Qi, Zhang Hongjiang, He Fan, Cheng Jinhua,
Keywords: mechanism of preferential abortion in the Three Gorges of the Yangtze River
Journal of Engineering Geology 2006- 14-3
ISSN 1004-9665
Institute of Soil and Water Conservation, Beijing Forestry University, Beijing 100083.
Based on a large number of field observation experiments, according to the form and energy state of soil moisture, the mechanism of rainfall infiltration on the slope of granite forest land in the Three Gorges of the Yangtze River is analyzed. It is found that when the rainfall intensity is greater than the infiltration rate of surface soil, the preferential flow on the slope of granite forest land in the Three Gorges of the Yangtze River begins to produce when the soil moisture content does not reach the maximum capillary capacity, and it is earlier than the time of soil leakage runoff. When the rainfall intensity is less than the infiltration rate of the surface soil, that is, there is no water on the surface, the soil seepage is earlier than the preferential flow; From the process of loam runoff production, under the condition of no accumulated water on the surface, soil seepage occurs before preferential flow; When the surface water accumulates and the soil water content does not reach the maximum capillary capacity, the preferential flow occurs before the soil seepage, and the peak value of the preferential flow precedes the soil seepage in both cases.
Study on the relationship between rainfall infiltration and soil erosion on the slope of granite forest land in the Three Gorges of the Yangtze River