|Table of Contents|

Harm Characteristics of Weeds in Flat-planting Narrow-row Solid-seeded Soybean(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年03期
Page:
536-538,542
Research Field:
Publishing date:

Info

Title:
Harm Characteristics of Weeds in Flat-planting Narrow-row Solid-seeded Soybean
Author(s):
GAO Tong-bin; HE Fu-li; ZHAO Chang-shan
Agronomy College of Northeast Agricultural University，Harbin 150030，Heilongjiang，China
Keywords:
Flat-planting narrow-row solid-seeding; Soybean; Weed damage
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2008.03.0536
Abstract:
Chemical weeding is the only method of weed control in flat-planting narrow-row solid-seeded soybean field，weed damage level and weeding period directly influences it’s economic benefit.In order to nail down the reasonable period and weed damage level of chemical weeding in flat-planting narrow-row solid-seeded soybeans and increase economic return of weed chemical control，we studied the influence of different weed density and intergrowth period on soybean yield.The harm characteristics of weed damage was surveyd by sampling method of diagonal five pionts in flat-planting narrow-row solid-seeded soybeans.The results showed that the curve between density of Avena fatua L.(x) and soybean yield(y) was y^= 2267.2Ln(x) - 4934.2，the theoretical economic threshold level was 10.75 plant.m-2.The yield of soybean declined by 61.1% when Xanthium sibiricum Patrin.was intergrowth with soybean in whole growth duration under the density of 6 plant.m-2.

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Last Update: 2014-10-08