Weed seedbank dynamics under different soil management systems

Planta Daninha

Brichenti, A.M.¹  Torres, E.¹  Gazziero, D.L.P.¹  Voll, E.¹  Embrapa Soja¹  Embrapa Soja, Londrina¹ 

关键词: no-till;    survival;    Brachiaria plantaginea;    Digitaria horizontalis;    Amaranthus spp.;    Acanthospermum hispidum;    Commelina benghalensis;    Bidens pilosa.;   

DOI  :  10.1590/S0100-83582001000200003

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 】

A field experiment was conducted from 1982 to 1998, in Londrina-PR, Brazil, to evaluate the effects of different soil management systems on the survival of a weed seedbank, with the weeds managed by herbicides, and the annual sequence of crops consisting of soybean - wheat. The soil management treatments were: 1) no-till; 2) mouldboard; 3) heavy disc, and 4) chisel. The experimental design was a randomized complete block, with four replications. Seed identification and counting were performed in 1990, 1995 and 1998. Estimates of seed survival in soil (at 1% of the initial population) of grasses Brachiaria plantaginea and Digitaria horizontalis, in the four soil management systems, were from 5 to 10 years and from 5 to 7 years, respectively; broadleaved weeds, such as Amaranthus spp., from 5 to 9 years; Acanthospermum hispidum, from 7 to 9 years; Commelina benghalensis from 10 to 20 years; Bidens pilosa, from 3 to 4 years; and the Commelinaceae Commelina benghalensis from 10 to 20 years. The weed species seeds present special features of survival in the soil as a function of soil management, control strategies along the years, and morphological and physiological characteristics of the seeds.

【 授权许可】

Unknown