The Effect of Drought Occurring at Different Growth Stages on Productivity of Grain Amaranth Amaranthus cruentus G6
The Effect of Drought Occurring at Different Growth Stages on Productivity of Grain Amaranth Amaranthus cruentus G6作者机构：Faculty of Agriculture University of Maribor Pivola 10 Hode 2311 Slovenia
出 版 物：《Journal of Life Sciences》 (生命科学（英文版）)
年 卷 期：2012年第6卷第3期
页 面：283-286页
学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 0901[农学-作物学]
主 题：Grain amaranth Amaranthus cruentus drought biomass allocation grain yield.
摘 要：A greenhouse pot experiment was conducted to study the effect of drought induced at different phenological stages on growth, biomass production and yield performance of grain amaranth Amaranthus cruentus G6. After emergence seedlings were exposed to different soil water regimes： constant adequate moisture （W1） and drought （W2） throughout the growing period, drought initiated at crop inflorescence formation （W3）, drought condition during pre-inflorescence formation （W4） and treatment W5 where drought condition occurred in the period from the beginning of inflorescence formation to the beginning of flowering. Crop samples were taken at the maturity. The growth and yield performance of amaranth were assessed by measuring root length, stem height and inflorescence length, and by evaluating fresh and dry weight of plant parts, grain yield and harvest index. Drought stress initiated at different phenological stages affected the evaluated morphological parameters, assimilate allocation and grain yield. Drought throughout the growing period resulted in grain and biomass yield reduction for 51% and 50%, respectively. Water deficit during inflorescence formation appears to be critical growing stage influencing grain yield, while soil drying in the vegetative growth stages improve the assimilate allocation to the above-ground biomass and particularly to the grain.
维普期刊数据库