The Study On The Growth And Rhizosphere Environment Of Peashrab Affected By P And Fe In Lime-soil

By doing the two experiments of cultivating Peashrab in pot and box, Peashrab'yield and highs and contents of P. N. K are studied by Phosphorus and Fe, and how the growing of Peashrab changes pH and EC and available-P and available-Fe is studied. The results as follows: 1.The main results of the experiment by the design method of complete random block were summarized as follows: By the treatment P3 (100mg/kg P2O5), Peashrab'yield increase the most biggest, the dye weight of shoot Vs black test increase 10.8-18.5%, the root increased 12.4%; content of Pho.in Peashrab's shoot is 0.570%, improving fodder's standard of Pho.Hight of Peashrab in relation to the amount of Phosphorus to soil is significance of correlation coefficient, the correlated coefficient is 0.9604*, Up to 0.05 significant level .In lower Phosphorus, Peashrab's main root and tip cap ratio increase. In growing period, the rhizosphere effect of Peashrab's growing can decrease pH, increase EC ,and improve available-P bigger .and improve activity of phosphate-enzyme of soil to 48.9μg phen/(100g soil), but adding Phosphorus fertilizer to soil can improve the level of applying Phosphorus. 2.The main results of the experiment by the design method of split plot were summarized as follows: the treatment : P2O5 0.15g(/kg soil)and FeSO4.7H2O 0.03g(/kg soil), is much better than the others, and could significantly promote the yield of Peashrab. The range of Peashrab rhizosphere is 0-9 mm around Peashrab's root. By the rhizosphere effect of Peashrab's growing, from 0 mm to 9 mm,pH increase ,and EC decrease, and the more Phosphorus fertilizer in soil increase, the faster available-P decrease, the more Fe. Fertilizer in soil increase, the faster available-Fe decrease.