DYNAMIC OF pH AND PHOSPHORUS OF WHEAT RHIZOSPHERE IN CALCAREOUS SOIL

The net separation culture pots were empoyed to plant winter wheat Those pots were put into E8H artificial climate box The pH, Olsen P and inorganic phosphate form in cumulic cinnamon soil under vary temperature conditions were studied The results showed that: (1) the pH of wheat rhizosphere and 0～3 mm soil layer were higher than that of 3～8mm and 8～50mm soil layers; (2) the furthest from the wheat roots, the content of Olsen P was higher and the content of Olsen P was reduce with the temperature ; (3) In more near from the wheat roots, the content of Ca2-P, Al-P, Fe-P and Ca8-P, was lower, and the content of O-P and Ca10-P had no obvious change With growth time prolonged and temperature raised , the content of Ca10-P was inerease, Ca2-P, Al-P,Fe-P and Ca8-P were decrease, and O-P had no obvious change