Crop coefficient estimated by degree-days for ‘Marandu’ palisadegrass and mixed forage
نویسندگان
چکیده
Considering profitability in pasture-based systems, investigating parameters affecting crop coefficients for irrigation management becomes important. In this experiment, we determined the coefficient of ‘Marandu’ palisadegrass based on accumulated degree-days and estimated plant water consumption under single (‘Marandu’ alisadegrass) mixed + black oats Italian ryegrass) cropping regimes. The research was conducted at Luiz de Queiroz College Agriculture Piracicaba, São Paulo, Brazil, between 2016 2017. Evapotranspiration assessed using weighing lysimeters while evapotranspiration calculated mean weight variation. Reference were estimated. Data obtained from an automated weather station. Equations regression models relating with generated two seasons (spring/summer autumn/winter) evaluated year-cycles, 2015 to 2018. results showed better prediction accuracy system spring/summer 2017–18. Highlights model determinating (Kc) by efficient use determination local. degree days Kc is more vantage because only necessary measure air temperature (maximum minimum). equations determining season Marandu palisade grass cultive show precision that mixture forage system.
منابع مشابه
Silicate and Phosphate Combinations for Marandu Palisadegrass Growing on an Oxisol
One of the greatest problems for pasture establishment and maintenance are the extremely low concentrations of available phosphorus in soils. The objective of this study was to evaluate the influences on productive and physiologic attributes during Marandu palisadegrass (Brachiaria brizantha) establishment, following changes in phosphorus availability in the soil through the applications of pho...
متن کاملEstimated Water Requirements and Stevia Rebaudiana Bertoni Crop Coefficient in Semi-Dry Climate under Lysimetric Conditions
Exactly estimating of water requirement is essential for water balance studies, design and management of irrigation systems and water resources management. Because of limited soil and water resources in Iran, for optimal use of water resources in the agricultural sector, it is necessary to determine the amount of water requirement by different plants in different climatological conditions. In o...
متن کاملNematode-degree days, a density-time model for relating epidemiology and crop losses in perennials.
The impact of Meloidogyne hapla on alfalfa (Medicago sativa) yield was described by a multiple point damage model as a function of current plant status, cumulative pest stress, and crop history. Nematode-degree days (NDD(female symbol)), calculated on a physiologic time scale as total area under the adult female population density curve, were used to express M. hapla parasitism as cumulative ne...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Revista De La Facultad De Ciencias Agrarias
سال: 2021
ISSN: ['0370-4661', '1853-8665']
DOI: https://doi.org/10.48162/rev.39.041