Competition of maize and Datura stramonium in an irrigated field

被引：0

作者：

Cavero, J ^{[1
]}

Zaragoza, C ^{[1
]}

Suso, ML ^{[1
]}

Pardo, A ^{[1
]}

机构：

[1] Diputac Gen Aragon, Serv Invest Agroalimentaire, Zaragoza 50080, Spain

来源：

CONGRESS 1997 - SOCIEDAD ESPANOLA DE MALHERBOLOGIA, PROCEEDINGS | 1997年

关键词：

D O I：

暂无

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Crop growth of maize and D. stramonium in monoculture. and competition was studied during three years in a flood, irrigated field. Plant density was 8,33 pl/m(2) for maize and 16,6 pl/m(2) for jimsonweed except in 1996 that it was 8,33 pl/m(2). Maize yield was decreased by 14 to 63 % when competing with jimsonweed. Yield reduction increased as the time between crop and weed emergence decreased. The development of leaf area was faster ill maize because the leaf area of maize seedlings al emergence time was greater than that of the weed. The faster growth of maize in leaf area and height reduced the photosynthetically. active radiation (PAR) received by the weed. The competition of jimsonweed slightly decreased the maximum LAI of the crop and leaf senescence of maize was increased. Competition ability of jimsonweed was mainly due to its higher light extinction coefficient and its habit growth with the leaves concentrated in the upper part of the canopy.

引用

页码：167 / 172

页数：6