生态学报2017，Vol.37Issue(21)：7342-7350,9.DOI:10.5846/stxb201608211712
长兴县合溪水库集雨区苗木地不同施肥管理模式对径流磷素流失的影响
Influence of different fertilization management modes on phosphorus loss in run-off from nursery land in the catchment area of Hexi reservoir in Changxing county
摘要
Abstract
In order to protect the main source of drinking water and ensure the quality of stream water from the Hexi reservoir,the government of Changxing county have adjusted the agricultural planting structure to nursery land in the catchment area of Hexi reservoir;however,the use of an optimized fertilization management mode is lacking.With this aim,site-specific observations were carried out in the catchment area of Hexi reservoir.Six fertilization management plots for typical nursery land were selected,including broadcast placement (contrast),plastic mulching,straw mulching,setting buffer for planting grass around nursery land,band placement,and hole placement,to explore the characteristics of different fertilization management modes on phosphorus loss in surface runoff,to screen the best fertilization management mode and to implement the the best method to reduce farmland phosphorous loss.The results showed that under different fertilization management modes,the concentration of annual phosphorus run-off erosion was in the order:broadcast placement (contrast) ＞ plastic mulching ＞ band placement ＞ hole placement ＞ setting buffer for planting grass around nursery land ＞ straw mulching.The mean annual run-off loads of total phosphorus from broadcast placement (contrast),plastic mulching,band placement,hole placement,setting buffer for planting grass around nursery land,and straw mulching were 9.60,9.14,5.49,4.44,2.48,1.37 kg hm-2 a-1,respectively.This indicates that hole placement,setting buffer for planting grass,and straw mulching were the best fertilization management modes.Additionally,the optimal combination of fertilization management modes for nursery land of the catchment area of Hexi reservoir in Changxing county would significantly reduce the non-point source output phosphorus run-off of nursery land and reduce the potential impact on water quality from the Hexi reservoir.In addition,phosphorus particles were the main and first form of phosphorus loss in run-off and the next was dissolved phosphorus under all fertilization management modes.Furthermore,with the broadcast placement (contrast),plastic mulching,straw mulching,setting buffer for planting grass around nursery land,band placement,and hole placement,the annual run-off loss of phosphorus particles accounted for about 66.09％,70.69％,67.97％,71.63％,68.11％ and 67.87％,respectively,of the total phosphorus.关键词
合溪水库/苗木地/地表径流/磷素流失Key words
Hexi reservoir/seeding land/run-off/phosphorus losses引用本文复制引用
廖敏,叶照金,黄宇,吕婷,沈杰,张云..长兴县合溪水库集雨区苗木地不同施肥管理模式对径流磷素流失的影响[J].生态学报,2017,37(21):7342-7350,9.基金项目
国家重点研发计划项目(2016YFD0200800) （2016YFD0200800）
