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Irrigation strategies with saline water on cherry tomato in greenhouse/Estrategias de irrigacao com agua salina no tomateiro cereja em ambiente protegido
The use of saline water for irrigation is a challenge for researchers and farmers, being fundamental to develop new strategies for irrigation management using these waters. Treatments consisted of six strategies of saline water application (T1-low salinity water (St 0.5 dS m-1) during entire cycle;...
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Published in: | Revista brasileira de engenharia agrĂcola e ambiental 2015-10, Vol.19 (10), p.913 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | Portuguese |
Online Access: | Get full text |
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Summary: | The use of saline water for irrigation is a challenge for researchers and farmers, being fundamental to develop new strategies for irrigation management using these waters. Treatments consisted of six strategies of saline water application (T1-low salinity water (St 0.5 dS m-1) during entire cycle; T2-saline water (S2-3.5 dS [m.sup.-1]) during entire cycle; T3-[S.sub.1] and [S.sub.2] during entire cycle; T4-[S.sub.1] and [S.sub.2], with root system divided by a plastic filter; T5-[S.sub.1] and [S.sub.2], with root system division and alternance of S1 and S2 each 15 days; T6-[S.sub.1] e [S.sub.2], without root system division, with water alternance every 15 days). Five harvests were carried out and plants were sampled 100 days after transplanting for evaluation of the following variables: number of leaves, leaf area, height, stem diameter, dry mass, number of fruits, mean mass of fruits and fruit yield. Most variables were affected by irrigation water salinity. The higher fruit yield was obtained using low salinity water and when waters were mixed and alternated each fifteen days, which demonstrates the viability of these techniques. Key words: Lycopersicon esculentum L. salt stress dividing the root system O uso de agua salina na irrigacao e um desafio para pesquisadores e produtores rurais, sendo fundamental o desenvolvimento de novas estrategias para manejo da irrigacao utilizando essas aguas. Os tratamentos foram constituidos por seis estrategias de aplicacao de agua salina (T1--Agua de baixa salinidade ([S.sub.1]-0,5 dS [m.sup.-1]) durante todo o ciclo; T2--Agua salina ([S.sub.2]-3,5 dS [m.sup.-1]) durante todo o ciclo; T3-[S.sub.1] e [S.sub.2] durante todo o ciclo; T4-St e S2, com divisao do sistema radicular por um filtro plastico; T5-[S.sub.1] e [S.sub.2], com divisao do sistema radicular alternando-se as aguas a cada 15 dias; T6-[S.sub.1] e [S.sub.2], sem divisao do sistema radicular alternando-se as aguas a cada 15 dias). Foram realizadas cinco colheitas de frutos e as plantas foram coletadas aos 100 dias apos o transplante e avaliadas quanto as seguintes variaveis: numero de folhas, area foliar, altura, diametro do caule, massa seca de folhas, massa seca de caule, massa seca de frutos, numero de cachos, numero de frutos e producao de frutos. A maioria das variaveis foi afetada pela salinidade da agua de irrigacao. O maior rendimento de frutos foi obtido com uso de agua de baixa salinidade e quando se realizou mistura de agua e alternando-as quinz |
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ISSN: | 1415-4366 |