WATER DEFICIT AT VARIOUS STAGES OF DEVELOPMENT OF THE POTATO

Revista Brasileira de Engenharia Agrícola e Ambiental

Minami, Keigo¹  Angelocci, Luís Roberto¹  Bezerra, Francisco Marcus Lima² 

[1] USP, Piracicaba, Brazil;UFC, Fortaleza, Brazil

关键词:  Solanum tuberosum;    evapotranspiration;    water balance;   

DOI  :  10.1590/1807-1929/agriambi.v02n02p119-123

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

Research was conducted under field conditions in the Piracicaba, SP, Brazil, to evaluate potato (Solanum tuberosum L.) "Monalisa" subjected to water deficit at different development stages. The experimental design consisted of completely randomized blocks, with eight treatments and four replications. Treatments consisted i of applying water stress at one or more development stages, starting 15 days after emergancy. Tuber formation stage, the most sensible one to water stress, had a 48.7% yield reduction in relation to the control. Water stress applied to the stages of, tuber initiation and tuber filling provided a sharp (65.4%) yield reduction. When applied to the three stages, water stress provided a drastic (70.5%) yield reduction. Water deficit also affected the number of tubers per plant and the tuber sizes.

【 授权许可】

Unknown