NUTRIENT LOSSES FROM CROPLAND IN THE CENTRAL HIGHLANDS OF KENYA DUE TO SURFACE RUNOFF AND SOIL-EROSION

被引：50

作者：

ZOBISCH, MA

RICHTER, C

HEILIGTAG, B

SCHLOTT, R

机构：

[1] UNIV KASSEL,FAC AGR,D-37213 WITZENHAUSEN,GERMANY

[2] UNIV NAIROBI,DEPT AGR ENGN,NAIROBI,KENYA

来源：

SOIL & TILLAGE RESEARCH | 1995年 / 33卷 / 02期

关键词：

SOIL EROSION; SURFACE RUNOFF; NUTRIENT LOSSES; KENYA; PHOSPHORUS LOSSES;

D O I：

10.1016/0167-1987(94)00441-G

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Soil loss, runoff and nutrient losses were measured on runoff plots during the rainy season from November 1992 to January 1993. Crops grown were maize (Zea mays L.), beans (Phaseolus, vulgaris L.) and an intercrop of maize and beans. The control treatment was bare fallow. The total loss of C, N, P, K and plant-available P and K in the eroded soil as well as P and K dissolved in the surface runoff water were not dependent on the nutrient concentration of the eroded soil and water, but rather on the total amount of runoff and eroded soil. Compared to bare fallow, P (and K) losses under maize were reduced to 24.2% (28.3%), under beans to 15.3% (15.4%) and under intercrop to 9.3% (10.7%).

引用

页码：109 / 116

页数：8

共 20 条

[1]

[Anonymous], 1975, MUNSELL SOIL COLOR C

[2]

FASSBENDER HW, 1971, AUSWASCHUNG NAHRSTOF, P19

[3]

GACHENE CKK, 1989, UNPUB SOILS EROSION

[4]

Gomez N., 1984, STAT PROCEDURES AGR, V2nd

[5]

Kurmies B., 1972, Phosphorsaure, V29, P118

[6]

Mati Bancy M., 1993, Zeitschrift fuer Kulturtechnik und Landentwicklung, V34, P265

[7]

MWANIKI JM, 1991, THESIS U NAIROBI

[8]

Nill D., 1993, Soil organic matter dynamics and the sustainability of tropical agriculture: proceedings of an International Symposium, Leuven, Belgium, 4-6 November 1991., P331

[9]

NJUGUNA SK, 1993, THESIS U NAIROBI

[10]

Quansah C., 1990, LANDUSE ENV, P67

← 1 2 →