Initial Growth of Soybean Plants from Seeds of High and Low Vigor Subjected to Water Stress

Antonio Carlos Souza Albuquerque Barros,Cassyo Araujo Rufino,Mario Borges Trzeciak,Mateus Pino,Lilian Madruga Tunes,Lizandro Ciciliano Tavares

doi:10.5539/jas.v4n6p246

Antonio Carlos Souza Albuquerque Barros, Cassyo Araujo Rufino

Open Access

https://doi.org/10.5539/jas.v4n6p246

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Abstract

This study intends to evaluate responses on the growth of soybeans plants from seeds with high and low vigor in different drought periods. Experimental design was completely randomized in factorial AXB (Factor A: variables 0, 2, 3, 4 and 5 water stress; Factor B: level of seed vigor, high and low). Evaluations of fresh matter, plant height, leaf area and dry weight of shoots, 10, 20, 30 and 40 days after emergence (DAE). Soybean plants originated from seeds with high physiological quality perform better than the plants originated from seeds of low vigor, until 40 DAE. Water stress reduces the initial growth of soybean plants originated from seeds of both high and low force, until 40 DAE. Soybean seeds of high vigor generate plants with higher growth rate of the culture until 30 DAE, besides generating plants with greater capacity for growth after returning water stress.

Highlights

Agriculture in Rio Grande do Sul is predominantly characterized by the spring-summer crops, especially soybean and rice, which account for approximately 70% of total grain production in the State
Soybean plants originated from seeds with high physiological quality perform better than the plants originated from seeds of low vigor, until 40 Days after Emergence (DAE)
As Kolchinski et al (2006), soybean plants originated from seeds of higher physiological quality, showed the highest growth rates in culture, as a result of plants with greater dry weight and leaf area at 30 days after emergence, and similar results were observed by Machado and Schuch (2004) in oat, Hofs et al (2004) in rice and Schuch et al (2000) in oats

Summary

Introduction

Agriculture in Rio Grande do Sul is predominantly characterized by the spring-summer crops, especially soybean and rice, which account for approximately 70% of total grain production in the State. Water stress affect the metabolism negatively, hindering the formation of leaf area, reducing the photosynthetic rate, leading to reduced supply of assimilates and abortion or reduction of developing seeds (Marcos Filho, 2005). This situation does not favor the crop development, affecting seeds production their quality. Considering the growth of individual plants in populations of soybean plants, (Kolchinski et al, 2005) found that plants from high vigor seeds had higher grain yield. This study intends to evaluate effects of water stress periods on the initial growth of soybeans plants from seeds of high and low vigor

Soil and Seed Features

Water Treatment and Assessments

Statistical Analysis

Results and Discussion

Comparison rate between Different Evaluation Periods

Conclusion