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Effects of [Eriochloa villosa(Thunb.) Kunth] on the Growth and Development of Spring Soybean and Its Economic Threshold in Northeast China(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2019年04期
Page:
584-588
Research Field:
Publishing date:

Info

Title:
Effects of [Eriochloa villosa(Thunb.) Kunth] on the Growth and Development of Spring Soybean and Its Economic Threshold in Northeast China
Author(s):
LI Wen-boCUI JuanXU WeiSHI Shu-sen
(College of Plant Protection,Jilin Agricultural University /Innovation Center of Soybean Region Technology,Changchun 130118,China)
Keywords:
Eriochloa villosa(Thunb.) KunthSoybeanYieldEconomic threshold
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2019.04.0584
Abstract:
Aimed to clarify the effect of [Eriochloa villosa(Thunb.) Kunth] on soybean growth and yield in Northeast soybean field in the same period and explore prevention method. The effects of main agronomic characteristics of soybean and the competition relationship betweenEriochloa villosaand soybean was studied with the method of adding densities series test under field conditions and fitting equation model and the economic threshold was calculated. Results showed that increasing density ofEriochloa villosasignificantly reduced plant height of soybean, soybean pod number per plant and yield under the interference and competition ofEriochloa villosa. Logarithmic functioned modely=22.102Ln(x)-42.592(R2=0.977 2;F=171.338 4;P=0.000 2)could fit the best relationship between the density ofEriochloa villosaand the soybean yield loss. According to EIL and the Logarithmic function model, the economic threshold of Eriochloa villosafor manual weeding was 15.05 plant?m-2, and the economic threshold for chemical weeding of 95% s-metolachlor EC, 24% enoxanone EC or 10.8% haloxyfop-P-methyl EC was 8.19, 7.59 and 7.67 plant?m-2, respectively.Eriochloa villosacompetes with soybean for light, water and nutrition of soil in the field, resulting in the yield reduction. Chemical herbicides control forEriochloa villosahas obvious economic advantage.

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Last Update: 2019-07-25