Xu H., Li H., 2016, Threshold Effect on Photosynthetic Parameters for Soil Volumetric Water Content of Hippophae rhamnoides, Chemical Engineering Transactions, 55, 367-372.
In order to make clear the suitable soil volumetric water content (SVWC) for net photosynthetic rate(Pn) and light response parameters of Pn in the Semi arid Loess Hilly Region, common species Hippophae rhamnoides used as experimental materials was studied with CIRAS-2 portable photosynthesis system made in PPS corporation of England. Pn and light response parameters of Pn were observed in different SVWC and Photosynthetic active radiation (PAR). The results show that Pn and light response parameters of Pn have notable threshold responses value to SVWC and PAR. In a word, Hippophae rhamnoides can adapt to a wide range of illumination intensity and have the property of strong drought-resistance but can not stand the high soil moisture environment. The experiment results have theoretical value of enriching and developing photosynthetic capacity and water research for plants in Semiarid Loess Hilly Region, and it can provide a solid foundation for plant selection.
