Fertilizer placement of maize. II. Root growth and water use
作者:
du ToitW.,
HumanJ.J.,
期刊:
South African Journal of Plant and Soil
(Taylor Available online 1995)
卷期:
Volume 12,
issue 3
页码: 124-127
ISSN:0257-1862
年代: 1995
DOI:10.1080/02571862.1995.10634350
出版商: Taylor&Francis Group
关键词: Fertilizer placement;maize;root growth;water use
数据来源: Taylor
摘要:
Normal fertilizer placement, two placements deeper than normal, a broadcast application and a non-fertilized control were compared to maximize production in a stubble tillage system. Root growth was evaluated at three growth stages from tassel initiation to flowering during the 1986/87 and 1987/88 growing seasons. Fertilizer placed in the soil stimulated deeper rooting, particularly during early vegetative growth stages. The lowest total root length was measured in no-fertilizer and broadcast treatments. No differences in total evapotranspiration were associated with treatments. The percentage of available water in the top 0.3 m soil was less than, 25% for most of the active growing period while in the 0.3–0.6-m soil layer available water generally exceeded 25%. This lead to the conclusion that fertilizer placed in the deeper soil layer is accessible to the plants for a longer period.
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