Effect of Application of CaO on Soil pH and Heavy Metal Content in Phyllostachysviolascens Stands

Selection of degraded Phyllostachys violascens stands was implemented in April of 2016 in Yuhang, Zhejiang province for establishing 12sample plots by randomized block design. Treatments of application of CaO were carried out with 0(ck), 1500, 4500 and 7500 kg/ha. pH and heavymetal content in the soil was determined in November. The result demonstrated that application of CaO could increase pH and decrease exchangeableacid (P<0.05). Compared with the control, pH of soil treated by CaO increased 0.21-0.60, exchangeable acid, H+ content and Al3+ content decreasedby 10.3%-32.2%, 13.5%-32.2% and 9.8%-31.3%. Application of CaO could evidently decreased Zn, Cu, Pb and Cd content by 13.4%-40.5%,23.4%-49.0%, 26.2%-55.0% and 3.4%-46.8%.