Studies on Phosphatase Activity Change Rule in NaCl Stress Maize of Soil

Jiayuan Tian, Jiani Li, Xiuping Tian*

College of Agronomy and Resources and Environment, Tianjin Agricultural University, Tianjin, 300384, China

Abstract: Taking the structure of asphalt concrete pavement in actual running as the test object, a kind of actual measurement project for temperature field pavement structure was put forward. Based on the abundant measured temperature data, distribution rules of asphalt pavement temperature field were studied in detail, and the dependency relations between the air temperature and pavement temperature field were discussed with regression analysis. Considering the effect difference to asphalt pavement temperature field which was applied by temperature rise period and temperature fall period of air, the dependency relations between air temperature and different temperature changing periods were researched respectively and the prediction models on asphalt pavement temperature based on different temperature changing periods were established. The comparison between measured and predicted asphalt pavement temperatures indicates that these models have good applicability and accuracy. In this paper, adopting the method of field experiment of salt pond, studying change rules of phosphatase activity in the soil of two kinds of maize with different concentration of NaCl stress. Test results show that the two maize varieties soil phosphatase activity decreased, with the increase of the concentration of NaCl stress corn soil phosphatase activity in different periods, efficiency in seedling stage and mature stage is low, different concentration of NaCl treatment of maize rhizosphere soil phosphatase activity is significantly higher than non rhizosphere soil. Phosphatase activity and various forms of phosphorus correlation analysis showed that Ca8 -P and alkali type, acid phosphatase activities were very significant positive correlation;Ca2 -P, effective phosphorus and acid, alkali phosphatase activities were significantly related. Ca10 -Pand acid type, alkaline phosphatase activity showed a negative correlation; Al - P, Fe, P, O - P and total phosphorus, and acid, alkali phosphatase activity not related. In addition, phosphatase activity can affect the effectiveness of soil P, P uptake of corn and corn production.

Keywords: NaCl solution stress ; Acid phosphatase; Alkaline phosphatase; Rhizosphere