|Table of Contents|

Influence of Echinochloa Crusgalli on the Growth of Spring Soybean and its Economic Threshold in Northeast China(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2016年06期
Page:
992-996.
Research Field:
Publishing date:

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Title:
Influence of Echinochloa Crusgalli on the Growth of Spring Soybean and its Economic Threshold in Northeast China
Author(s):
CUI Juan1;  DONG Li-huan2;  WU Lei3;  SHI Shu-sen1
（1.College of Agronomy, Jilin Agricultural University, Changchun 130118, China; 2.Agricultural Technology Extension Center of Huairen County, Benxi 117200, China; 3.Agricultural Technology Extensiou Station of Changchun City, Changchun 130033, China）
Keywords:
Echinochloa crusgalli;  Soybean;  Yield properties;  Economic threshold
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2016.06.0992
Abstract:
Echinochloa crusgalli is a troublesome weed in Northern China and seriously damages soybean growth and reducing soybean yield in soybean fields. A field experiment was carried out to study the effects of E crusgalli of different densities (0, 20, 40, 60, 80 and 100 plant·m-2) on the soybean growth and yield by the method of additive series experiment Results showed that increasing density of E crusgalli significantly reduced soybean’s pods per plant and yield.There was no significant impact on soybean plant height. The linear function model was the best in describing the relationship between E crusgalli density and soybean yield as y=-12.863x+2 720.396(R2=0.982; F=217.340; P=0.001); while the linear function model as y=0.467x+1.017(R2=0.982; F=217.352; P=0.000 1) was better for describing the relationship between E crusgalli-density and yield loss.Economic threshold of E crusgalli control was 24.65-27.89 plants·m-2 for manual weeding, while for the chemical herbicides of 90% acetochlor EC, 12.5% sethoxydim EC, 5% quizalofopP EC were 2.79-3.39，3.45-4.12 and 3.18-3.95 plant·m-2, respectively

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Last Update: 2016-12-09