SUSPENDED-SOLIDS AND PHOSPHORUS LOADS FROM A CLAY SOIL .1. PLOT STUDIES

被引：88

作者：

CULLEY, JLB ^{[1
]}

BOLTON, EF ^{[1
]}

BERNYK, V ^{[1
]}

机构：

[1] AGR CANADA,RES STN,HARROW N0R 1G0,ONTARIO,CANADA

来源：

JOURNAL OF ENVIRONMENTAL QUALITY | 1983年 / 12卷 / 04期

关键词：

PHOSPHORUS COMPOUNDS - SEDIMENTATION - WATER ANALYSIS;

D O I：

10.2134/jeq1983.00472425001200040011x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Phosphorus and suspended solids (SS) contents in tile discharge from two southwestern Ontario clay soil drainage experiments were measured over a 2-y period. For continuous corn plots, loads of SS and total P were 407 and 0. 88 kg ha** minus **1 y** minus **1, respectively. Suspended solids and total P loads from drains beneath permanent sod were 97 and 1. 85 kg ha** minus **1 y** minus **1, respectively. Comparison of these results with limited data on P and SS loads in surface runoff indicated that more than 50% of the total P load from these nearly level plots may be lost via subsurface tile flow. Overall, 34% of the total P load from subsurface drains was sediment-associated. Furthermore, crop cover, P fertilization rate, and tile drain depth were found to significantly affect dissolved P export.

引用

页码：493 / 498

页数：6

共 17 条

[1]

ACTON CJ, 1979, SOIL SURVEY 6 AGR SU

[2]

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