Impact of Potassium Fertilization and Cultivation Methods on Productivity and Water Use Efficiency of Sugarcane

ABSTRACT Arugula is a vegetable that has gained more highlight in the consumption, being rich in potassium, sulfur, iron, omega-3 and vitamins A and C. Availability of water and nutrients are limiting factors for production of this crop. In this context, the objective of this study was to evaluate the production of arugula subjected to different irrigation depths and potassium fertilization. The experiment was conduct between August and September 2015. The experimental design was completely randomized in split-plot scheme. Irrigation depths L1, L2, L3 and L4 (25, 50, 75 and 100% of crop evapotranspiration, respectively) represented the plots and potassium doses K1 and K2 (200 and 400 kg ha-1, respectively) represented the subplots. Although the highest yield was obtained with highest irrigation depth and highest potassium dose, it is recommended the cultivation of arugula with the lowest irrigation depth and the lowest potassium dose, considering the higher value of water use efficiency for this treatment.

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EEFECT OF IRRIGATION AT DIFFERENT SOIL MOISTURE DEPLETION LEVELS AND RATES OF POTASSIUM FERTILIZATION ON PRODUCTIVITY AND WATER USE EFFICIENCY OF SUGAR BEET

Journal of Soil Sciences and Agricultural Engineering ◽

10.21608/jssae.2008.166851 ◽

2008 ◽

Vol 33 (1) ◽

pp. 857-870

Author(s):

A.Z. El-Bably ◽

N.M.M. Awad

Keyword(s):

Soil Moisture ◽

Sugar Beet ◽

Water Use Efficiency ◽

Water Use ◽

Potassium Fertilization ◽

Use Efficiency

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NITROGEN AND POTASSIUM IN SAFFLOWER: CHLOROPHYLL INDEX, BIOMETRIC CHARACTERISTICS AND WATER USE EFFICIENCY

Revista Caatinga ◽

10.1590/1983-21252018v31n219rc ◽

2018 ◽

Vol 31 (2) ◽

pp. 424-433

Author(s):

ELLEN CRISTINA ALVES DE ANICÉSIO ◽

EDNA MARIA BONFIM-SILVA ◽

TONNY JOSÉ ARAÚJO DA SILVA ◽

ADRIANO BICIONI PACHECO

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Polynomial Regression ◽

Index Number ◽

Soil Water Tension ◽

Potassium Fertilization ◽

Use Efficiency ◽

Chlorophyll Index ◽

Water Tension ◽

Nitrogen Rates

ABSTRACT Safflower crops is usually intended for production of seeds to oil extraction. The objective of this work was to evaluate the chlorophyll index, biometric characteristics and water use efficiency of safflower plants grown under different nitrogen and potassium rates and controlled soil water tension. The experiment was conducted in a greenhouse, in pots containing 8 dm3 of a Oxisol. A complete randomized block experimental design in a 5x5 factorial arrangement was used, with four replications, consisting of five nitrogen rates (0, 60, 120, 180 and 240 mg dm-3) and five potassium rates (0, 50, 100, 150 and 200 mg dm-3). The safflower number of leaves, stem diameter, chlorophyll index, number of capitula, shoot, root and total dry weights, water consumption and water use efficiency were evaluated. Data were subjected to analysis of variance (F test) at 5% of probability and to polynomial regression. The nitrogen and potassium fertilization, as independent factors, affected the safflower plants. The chlorophyll index, biometric characteristics and water use efficiency of safflower showed better responses under nitrogen rates of 82 to 168 mg dm-3. The responses of chlorophyll index, biometric characteristics and water use efficiency of safflower increased 10 to 60% with potassium fertilization.

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