An agronomic test to manage phosphorus environmental risk from pastures with good grazing management

环境科学 地表径流 壤土 土壤水分 农学 土壤健康 腐蚀 放牧 水文学(农业) 土壤科学 土壤有机质 生态学 生物 化学 有机化学 古生物学 岩土工程 工程类
作者
Murray Hart,P. S. Cornish
出处
期刊:Soil Research [CSIRO Publishing]
卷期号:52 (3): 293-293 被引量:3
标识
DOI:10.1071/sr13262
摘要

Management of phosphorus (P) environmental risk has been hampered by the lack of widely applicable threshold values for the soil properties that determine concentrations of P in runoff. This paper simplified the task of developing threshold values by restricting land-use to pastures and by using a single methodology based on simulated rainfall across 38 field sites (76 plots) that included a range of land-use intensities, and soils that varied widely in lithology and soil properties. An ‘adjusted’ soil-test P was determined from the measured Colwell-P minus the threshold P for agronomic response, which was estimated from P-buffering index (PBI). Concentrations of total P (TP) in runoff rose exponentially with rising ‘adjusted’ soil-test P, although only with pastures with high groundcover (r2 = 0.87), or if plots were protected from erosion with a cover of shade-cloth (r2 = 0.70). Concentrations of TP in runoff were low (<0.5 mg L–1) where adjusted Colwell-P was less than zero, which on this scale is the threshold for agronomic response. Similar results were found for dissolved reactive P (DRP) in runoff, although for plots with soil P below the agronomic threshold, the concentrations of DRP were lower than for TP. We conclude that Colwell-P and soil PBI together provide a widely applicable test for environmental P risk from pastures with good ground cover. The same threshold values may be used for both agronomic and environmental purposes.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
清新的夜蕾完成签到 ,获得积分10
刚刚
1秒前
zjw完成签到,获得积分10
1秒前
虚幻白桃完成签到,获得积分10
2秒前
酷酷的紫南完成签到 ,获得积分10
2秒前
glass_light发布了新的文献求助10
2秒前
Allen完成签到,获得积分10
2秒前
zyh完成签到 ,获得积分10
2秒前
fafafa发布了新的文献求助10
2秒前
zhengzehong完成签到,获得积分10
3秒前
3秒前
优雅夕阳完成签到 ,获得积分10
3秒前
4秒前
AAAAA完成签到 ,获得积分10
4秒前
123456完成签到,获得积分10
4秒前
4秒前
阿狸a完成签到,获得积分10
4秒前
Maglev完成签到,获得积分10
4秒前
4秒前
Sv完成签到 ,获得积分10
5秒前
量子星尘发布了新的文献求助10
6秒前
郑仕完成签到,获得积分10
6秒前
7秒前
7秒前
科研女郎完成签到 ,获得积分10
7秒前
略略略完成签到,获得积分10
7秒前
缘分完成签到,获得积分0
7秒前
中宝完成签到,获得积分10
7秒前
Ds发布了新的文献求助30
7秒前
SUNstp完成签到,获得积分10
8秒前
jinboyuan完成签到,获得积分10
8秒前
9秒前
郑仕发布了新的文献求助10
9秒前
sxpab发布了新的文献求助10
10秒前
10秒前
10秒前
灰烬发布了新的文献求助10
11秒前
有我ID随机吗完成签到,获得积分10
11秒前
fafafa完成签到,获得积分10
11秒前
浑灵安完成签到 ,获得积分10
11秒前
高分求助中
(应助此贴封号)【重要!!请各用户(尤其是新用户)详细阅读】【科研通的精品贴汇总】 10000
Nuclear Fuel Behaviour under RIA Conditions 500
Sociologies et cosmopolitisme méthodologique 400
Why America Can't Retrench (And How it Might) 400
Another look at Archaeopteryx as the oldest bird 390
Higher taxa of Basidiomycetes 300
Partial Least Squares Structural Equation Modeling (PLS-SEM) using SmartPLS 3.0 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 物理化学 基因 催化作用 遗传学 冶金 电极 光电子学
热门帖子
关注 科研通微信公众号,转发送积分 4670008
求助须知:如何正确求助?哪些是违规求助? 4049401
关于积分的说明 12522264
捐赠科研通 3743055
什么是DOI,文献DOI怎么找? 2067196
邀请新用户注册赠送积分活动 1096598
科研通“疑难数据库(出版商)”最低求助积分说明 976878