Phosphorus loss by surface runoff in no-till system under mineral and organic fertilization

被引：32
|
作者：
Bertol, Oromar Joao [1 ]
Rizzi, Nivaldo Eduardo [2 ]
Favaretto, Nerilde [2 ]
Lana, Maria do Carmo [3 ]
机构：
[1] EMATER, BR-80035270 Curitiba, Parana, Brazil
[2] UFPR, Dept Solos & Engn Agr, BR-80035050 Curitiba, Parana, Brazil
[3] UNIOESTE, Ctr Ciencias Agr, BR-85960000 Merechal Candido Rondon, Parana, Brazil
来源：
SCIENTIA AGRICOLA | 2010年 / 67卷 / 01期
关键词：
liquid swine manure; water quality; eutrophication; soil erosion; conservation tillage; AGRICULTURAL PHOSPHORUS; BIOAVAILABLE PHOSPHORUS; RAINFALL INTENSITY; WATER-QUALITY; MANURE; SOIL; TRANSPORT; NITROGEN; EUTROPHICATION; CONSERVATION;
D O I：
10.1590/S0103-90162010000100010
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The no-till system has been intensively used in the state of Parana, Brazil, and it has increased the nutrients level at the soil surface. This has contributed for nutrient losses via runoff and consequently, off-site water pollution. The objective of this study was to evaluate phosphorus loss in surface runoff by simulated rainfall on an Oxisol, under no-till system following application of mineral fertilizer and liquid swine manure. Nitrogen, soil and water losses from the same study are reported in a separated paper. The application of liquid swine manure, compared with mineral fertilization, increased runoff concentration of total P, particulate P and dissolved reactive P by 193%, 111% and 506%, respectively, averaged for all rainfall intensities. Independently on the fertilizer source, the highest rainfall intensity provided the greatest concentration and loads of P in runoff.
引用
收藏
页码：71 / 77
页数：7
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