浙江农业学报
浙江農業學報
절강농업학보
ACTA AGRICULTURAE ZHEJIANGENSIS
2014年
1期
154-158
,共5页
赵伟明%王艳艳%马嘉伟%胡杨勇%童根平%赵科理%叶正钱
趙偉明%王豔豔%馬嘉偉%鬍楊勇%童根平%趙科理%葉正錢
조위명%왕염염%마가위%호양용%동근평%조과리%협정전
山核桃%石灰岩%临界值%土壤磷淋失%Olsen-P%CaCl2-P
山覈桃%石灰巖%臨界值%土壤燐淋失%Olsen-P%CaCl2-P
산핵도%석회암%림계치%토양린림실%Olsen-P%CaCl2-P
Chinese Hickory orchard%limestone%critical valve%P leaching%Olsen-P%CaCl2-P
以天目山地区临安市岛石镇下塔村和湍口镇湍口村发育于石灰岩的山核桃林地土壤为研究对象,采集林地表层(0~20 cm)土壤样品,用于评估长期施肥对山核桃林地土壤磷素状况的影响及其潜在的淋失风险。土壤分析表明:土壤Olsen-P存在较大的空间变异,含量低的近于0 mg· kg-1,而最高的含量达89.3 mg· kg-1。土壤CaCl2-P与Olsen-P相关分析显示,岛石镇和湍口镇土壤Olsen-P的临界值分别为19.3和29.3 mg· kg-1。据此,岛石和湍口两地土壤发生磷淋失的林地分别占调查林地的30%和45%。表明研究区已经有相当数量的山核桃林地因土壤磷素积累而存在淋失风险,需要引起重视。
以天目山地區臨安市島石鎮下塔村和湍口鎮湍口村髮育于石灰巖的山覈桃林地土壤為研究對象,採集林地錶層(0~20 cm)土壤樣品,用于評估長期施肥對山覈桃林地土壤燐素狀況的影響及其潛在的淋失風險。土壤分析錶明:土壤Olsen-P存在較大的空間變異,含量低的近于0 mg· kg-1,而最高的含量達89.3 mg· kg-1。土壤CaCl2-P與Olsen-P相關分析顯示,島石鎮和湍口鎮土壤Olsen-P的臨界值分彆為19.3和29.3 mg· kg-1。據此,島石和湍口兩地土壤髮生燐淋失的林地分彆佔調查林地的30%和45%。錶明研究區已經有相噹數量的山覈桃林地因土壤燐素積纍而存在淋失風險,需要引起重視。
이천목산지구림안시도석진하탑촌화단구진단구촌발육우석회암적산핵도임지토양위연구대상,채집임지표층(0~20 cm)토양양품,용우평고장기시비대산핵도임지토양린소상황적영향급기잠재적림실풍험。토양분석표명:토양Olsen-P존재교대적공간변이,함량저적근우0 mg· kg-1,이최고적함량체89.3 mg· kg-1。토양CaCl2-P여Olsen-P상관분석현시,도석진화단구진토양Olsen-P적림계치분별위19.3화29.3 mg· kg-1。거차,도석화단구량지토양발생린림실적임지분별점조사임지적30%화45%。표명연구구이경유상당수량적산핵도임지인토양린소적루이존재림실풍험,수요인기중시。
In this paper , 50 top soil samples ( 0-20 cm ) were collected from Chinese hickory ( Carya cathayensis Sarg.)orchards located at Daoshi and Tuankou towns of Lin'an City, Zhejiang Province, to assess the potential risk of phosphorus ( P) leaching induced by long-term fertilizer application .Soil analysis showed that soil Olsen-P had a great spatial variability , being 0-89.3 mg· kg-1 .Analysis of correlations between Olsen-P and CaCl 2-P showed that the critical values ( change-point) of soil Olsen-P in Daoshi and Tuankou towns were 19.3 and 29.3 mg· kg -1 , re-spectively .Soil Olsen-P exceeding the critical values accounted for 30% and 45% of all the investigated orchards , respectively, in Daoshi and Tuankou towns .