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Titolo:
The effects of cultural practices on methane emission from rice fields
Autore:
Ko, JY; Kang, HW;
Indirizzi:
Rural Dev Adm, Natl Yeongnam Agr Expt Stn, Milyang 627130, Kyweongnam, South Korea Rural Dev Adm Milyang Kyweongnam South Korea 627130 weongnam, South Korea
Titolo Testata:
NUTRIENT CYCLING IN AGROECOSYSTEMS
fascicolo: 1-3, volume: 58, anno: 2000,
pagine: 311 - 314
SICI:
1385-1314(200011)58:1-3<311:TEOCPO>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOIL;
Keywords:
direct seeding; transplanted seedling; plowing time;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Ko, JY Rural Dev Adm, Natl Yeongnam Agr Expt Stn, Milyang 627130, Kyweongnam, South Korea Rural Dev Adm Milyang Kyweongnam South Korea 627130 m, South Korea
Citazione:
J.Y. Ko e H.W. Kang, "The effects of cultural practices on methane emission from rice fields", NUTR CYCL A, 58(1-3), 2000, pp. 311-314

Abstract

A field experiment was conducted in a clayey soil to determine the effectsof cultural practices on methane (CH4) emissions from rice fields. The factors evaluated were a) direct seeding on dry vs wet soil, b) age of transplanted seedlings (8 d old and 30 d old), and c) fall vs spring plowing. Methane emissions were measured weekly throughout the rice-growing season usinga closed static chamber technique. Transplanted 8-d-old seedlings showed the highest emission of 42.4 g CH4 m(-2) season(-1), followed by transplanted 30-d-seedlings (40.3 g CH4 m(-2) season(-1)), and direct seeding on wet soil (37.1 g CH4 m(-2) season(-1)). Direct seeding on dry soil registered the least emission of 26.9 g CH4 m(-2) season(-1). Thus transplanting 30-d-old seedlings, direct seeding on wet soil, and direct seeding on dry soil reduced CH4 emission by 5%, 13%, and 37%, respectively, when compared with transplanting 8-d-old seedlings. Methane emission under spring plowing was 42.0 g CH4 m(-2) season(-1) and that under fall plowing was 31.3 g CH4 m(-2) seasons(-1). The 26% lower emission in the field plowed in spring was causedby degradation of organic matter over the winter.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/10/20 alle ore 01:37:40