Determining the critical period of weeds interference on soybean yield: use of broken-stick model

Planta Daninha

EMBRAPA, Brasilia¹  UNESP, Botucatu¹  Marcondes, Daniel A.S.¹  Luiz, Alfredo J.B.¹  Silvas, Carlos A.R. da¹  Spadotto, Claudio A.¹  EMBRAPA, Jaguariúna¹ 

关键词: Regression models;    control;    weed management;    ecology;    Glycine max.;   

DOI  :  10.1590/S0100-83581994000200001

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

This research is in support of weed management programs. A field experiment was carried out in Botucatu (São Paulo, Brazil), with the objective to determine the critical period of broadleaf weed interference on soybean, using statistical procedures of regression analysis. A randomized block design was used with 3 replications. The crop was kept weed infcsted for different periods. The criticar period of weed interference determined by the Broken-Stick modo was between 21-30 days after crop emergence. Broadleaf weeds in soybeanel crops can be controled with single use of remedial methods without residual effect.

【 授权许可】

Unknown