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Titolo:
Valuation of nutrient losses due to soil erosion in a tropical upland agroecosystem
Autore:
Josue, DS; Mendoza, TC;
Indirizzi:
Mindanao State Univ, Datu Odin Sinsaut, Maguindanao, Philippines Mindanao State Univ Maguindanao Philippines t, Maguindanao, Philippines Univ Philippines, Dept Agron, College 4031, Laguna, Philippines Univ Philippines College Laguna Philippines 4031 031, Laguna, Philippines
Titolo Testata:
PHILIPPINE AGRICULTURAL SCIENTIST
fascicolo: 1, volume: 84, anno: 2001,
pagine: 90 - 98
Fonte:
ISI
Lingua:
ENG
Keywords:
soil erosion; cropping systems; topsoil; productivity; upland ecosystems;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Josue, DS Mindanao State Univ, Datu Odin Sinsaut, Maguindanao, PhilippinesMindanao State Univ Maguindanao Philippines anao, Philippines
Citazione:
D.S. Josue e T.C. Mendoza, "Valuation of nutrient losses due to soil erosion in a tropical upland agroecosystem", PHILI AGR S, 84(1), 2001, pp. 90-98

Abstract

Soil erosion rates and nutrient losses in four different cropping systems in Batabat Sur, Bondoc Peninsula, Quezon Province in the Philippines, were measured and analyzed with belt transects (BTs) sampling and their monetaryequivalents computed with current market valuation. Large differences in soil erosion rates were observed among BTs in the four cropping systems. The highest soil erosion rate was observed in BTs undercorn monocrop at 159 t ha(-1) yr(-1) valued at PhP 7169 t ha(-1) yr(-1), and the lowest was 5.0 t under coconut monocrop valued at PhP 642 t ha(-1) (yr-1) in the same slope range of 15.1-35%. NPK losses in corn monocrop, coconut monocrop and coconut-corn intercrop were 362, 12 and 200 kg ha(-1) yr(-1), respectively. Lowest values were observed under coconut monocrop at all slope ranges where soil erosion was lowest. Coconut was able to prevent soil erosion. The presence of this crop is essential in soil-water conservation practices in the uplands of Bondoc Peninsula. While coconut monocropping was still the dominant cropping system (53.3% of the 60 BTs), the practice of intercropping corn (25% at the start of the study) would increase at the end of the study. This could be attributed to the low income derived from growing coconut alone. Intercropping corn under coconut increased the net income, but it also led to a 12-fold increase in the rate of soil erosion (90 tons ha(-1) yr(-1) in the 15.1-35% slopes). The added net benefit from corn (PhP 1,025 ha(-1)) was lower comparedwith the value of nutrient losses (PhP 3,521.5 ha(-1)) in the eroded soil. Based on the findings, it is necessary to promote soil conservation-oriented coconut-based farming systems in the Bondoc Peninsula and similar agroecosystems in the country.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 22:43:34