Interseeding a Cover Crop as a Weed Management Tool is More Compatible with Soybean than with Maize in Organic Farming Systems

被引：10

作者：

Uchino, Hiroshi ^{[1
,2
]}

Iwama, Kazuto ^{[1
]}

Jitsuyama, Yutaka ^{[1
]}

Yudate, Toshiko ^{[1
]}

Nakamura, Satoshi ^{[1
]}

Gopal, Jai ^{[3
]}

机构：

[1] Hokkaido Univ, Grad Sch Agr, Dept Bot & Agron, Lab Crop Sci, Sapporo, Hokkaido 0608589, Japan

[2] Tohoku Agr Res Ctr, Natl Agr & Food Res Org NARO, Morioka, Iwate 0200198, Japan

[3] Indian Council Agr Res, Directorate Onion & Garl Res, Pune 410505, Maharashtra, India

来源：

PLANT PRODUCTION SCIENCE | 2015年 / 18卷 / 02期

关键词：

Canopy structure; Ground cover pattern; Maize (Zea mays L.); Soybean (Glycine max Merr.); Vegetation cover ratio; Weed spatial distribution; PLACEMENT GEOMETRY; PEST-MANAGEMENT; FERTILIZER BAND; WINTER-WHEAT; GROUND COVER; SPRING WHEAT; LEAVES; SOIL; ORIENTATION; TEMPERATURE;

D O I：

10.1626/pps.18.187

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Weeds are the most serious threat to crop production in organic farming systems. Information on the spatial distribution of weeds is important for effective weed management. The objective of this study was to evaluate the effect of the ground cover of the main crops (soybean and maize) and cover crop on the spatial distribution of weeds for two row sections, 'within the row (IR)' and 'between the rows (BR)'. The cover crop was interseeded in BR 3 - 4 weeks after sowing the main crops in two years, and weed density and vegetation cover ratio (VCR, an index of ground cover) of the main crops and cover crop were measured. There was a significant difference in the spatial distribution of weeds between the two main crops. In IR, weed density was higher in maize than in soybean, while in BR, it was higher in soybean. This means that weed suppression in IR was more important for maize, while the suppression in BR was more important for soybean. The negative relationship between VCR of the main crop plus cover crop and weed density in each row section suggests that the difference in ground cover was one of the reasons for the difference in weed density between the two main crops. The cover crop markedly increased the VCR in BR, but only slightly increased VCR in IR in both main crops. These results suggest that the cover crop was more compatible with soybean than with maize, because the high weed density in IR of maize could not be decreased sufficiently by the slight increase of VCR in BR by the cover crop.

引用

页码：187 / 196

页数：10