Analysis of nitrogen and phosphorus loss of typical economic forests in Zhejiang Province

Abstract

The quantitative relationship between accumulated rainfall and accumulated total nitrogen and total phosphorus loss was analyzed by setting up economic forest experimental sites in typical regions of Zhejiang Province, and the response efficiency of accumulated total phosphorus and total nitrogen loss in different economic forests to rainfall was compared The results showed that there was a significant linear relationship between accumulated rainfall and accumulated total nitrogen and total phosphorus loss. The total nitrogen and total phosphorus loss rate of Castanea mollissima Blum economic forest was higher than that of Phyllostachys edulis forest and nursery > Morella rubra > Camellia sinensis > Phyllostachys edulis. Man-made disturbance of economic forest will accelerate the loss of total nitrogen and total phosphorus, and its loss rate is 1.5~4 times that of natural economic forest. The total nitrogen loss rate of 28% and total phosphorus loss rate of 47% can be reduced by planting shrubs or herbs under the in the Phyllostachys edulis forest. The purification efficiency of total phosphorus and total nitrogen of different economic forests is affected by economic forest types, ecological restoration, rainfall, and the purification efficiency varies between 30% and 70%.