Analisis Neraca Air dan Kebutuhan Air Tanaman Jagung  (Zea Mays L.) Berdasarkan Fase Pertumbuhan Di Kota Tarakan

Abstrak. Salah satu upaya peningkatan produktivitas tanaman jagung adalah penyediaan air yang cukup untuk pertumbuhan tanaman. Tanaman jagung sangat membutuhkan air dalam proses pertumbuhan dan perkembangannya. Ketepatan pemberian air sesuai dengan fase pertumbuhan tanaman jagung sangat berpengaruh terhadap produksi. Kelebihan dan kekurangan air akan mengakibatkan tanaman jagung mengalami penurunan dalam proses pertumbuhan dan produksinya. Penelitian ini bertujuan untuk menganalisis neraca air dan kebutuhan air pada tanaman jagung berdasarkan fase pertumbuhan di wilayah Kota Tarakan. Penelitian ini dibagi dalam beberapa tahapan yaitu pengumpulan data iklim bulanan periode 2008-2017, analisis neraca air dengan metode Thornthwaite-Mather, dan analisis kebutuhan air tanaman jagung berdasarkan fase pertumbuhan. Hasil penelitian menunjukan bahwa (1) Wilayah Kota Tarakan memiliki curah hujan andalan 3497,68 mm/tahun. (2) Total surplus 2997,84 mm/tahun, limpasan 1630,31 mm/tahun, dan pengisian air tanah 1367,53 mm/tahun. (3) Selama satu periode penanaman tanaman jagung rata-rata membutuhkan air sebesar 256,55 mm. (4) Total evapotranspirasi tanaman jagung selama 4 periode penanaman sebesar 1026.18 mm/tahun dan memiliki ketersediaan air yang sangat cukup serta setiap bulannya memiliki nilai surplus sepanjang tahun.Analysis of Water Balance and Crop Water Requirements of Corn (Zea mays L.) Based on Growth Phases in Tarakan CityAbstract. The effort to increase the productivity of corn plants is the provision of sufficient water for plant growth. Corn is a plant that needs water for the process of growth and development. The accuracy of the water supply following the growth phase of corn plants is very influential in production. Excess and deficiency of water will cause corn plants to decrease in the process of growth and production. This study aims to analyze the water balance and crop water requirements in corn-based on the growth phase in the City of Tarakan. This research was divided into several stages, namely the collection of monthly climate data for the period 2008-2017, analysis of water balance by using Thornthwaite-Mather method, and analysis of corn crop water requirements based on the growth phase. The results showed that (1) the Tarakan City area had a rainfall of 3497.68 mm/year. (2) The rainfall surplus is 2997.84 mm/year, runoff 1630.31 mm/year, and groundwater recharge 1367.53 mm/year. (3) During the one planting period, corn plants require an average of 256.55 mm of water. (4) The consumptive use (ETc) of corn plants during the 4 planting periods is 1026.18 mm/year and has a very adequate water supply and every month has more value throughout the year.

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Manajemen Irigasi Pembibitan Sawit (Elaeis guineensis) Presisi dengan Cropwat 8.0

Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) ◽

10.23960/jtep-l.v8i2.97-106 ◽

2019 ◽

Vol 8 (2) ◽

pp. 97

Author(s):

Lisma Safitri

Keyword(s):

Soil Properties ◽

Water Use ◽

Palm Oil ◽

Irrigation Scheduling ◽

Water Requirement ◽

Crop Water Requirement ◽

Climate Data ◽

Crop Water ◽

Water Requirements ◽

Crop Water Requirements

The accurate water use information at each stage of plant growth is important to better understand the efficient and precise crop water requirement for optimal plant productivity. Nurseries of palm oil are a phase where young palm oil requires extra maintenance, particularly in meeting the plant water needs. The palm oil in the nursery phase require the regular irrigation schedule due to the vulnerable root systems. The purpose of this study was to calculate the oil palm water requirement with Cropwat 8.0 toward the precise irrigation management and provide a scenario for irrigation scheduling in palm oil nursery. The study was conducted in palm oil main nurseries at KP2 Instiper Yogyakarta with site-specific climate data and soil properties. The method used is analyzing climate data and soil properties and simulating crop water requirements, actual water use and irrigation scheduling with Cropwat 8.0. Based on the results, the average of crop water requirement (ETP) of palm oil in main nursery is 3.4 mm / day. Based on the water deficit scenario from rainfall and crop water requirements, irrigation is scheduling in April for 1.4 mm, May for 18.3 mm, June for 3.5 mm, July for 44.1 mm and August for 42.8 mm. On a daily scale and taking into account the availability of soil moisture and the water retention of plant roots, the net irrigation scheduling is given at an average of 2.2 mm / day and gross irrigation of 6 mm / day which is given daily depending on rainfall and plant age.

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Long-Term Water Balance of Selected Field Crops in Different Agricultural Regions of the Czech Republic Using Fao-56 and Soil Hydrological Approaches

Sustainability ◽

10.3390/su11195243 ◽

2019 ◽

Vol 11 (19) ◽

pp. 5243 ◽

Cited By ~ 2

Author(s):

Renata Duffková ◽

Jiří Holub ◽

Petr Fučík ◽

Jaroslav Rožnovský ◽

Ivan Novotný

Keyword(s):

Czech Republic ◽

Water Stress ◽

Water Balance ◽

Oilseed Rape ◽

Crop Water ◽

Water Requirements ◽

The Czech Republic ◽

Crop Water Requirements ◽

Crop Water Stress

Long-term water balance (WB) of four selected crops (winter wheat, oilseed rape, silage maize, semi-early potatoes) was determined at the field block scale in the Czech Republic for all agricultural growing areas (AGAs): maize-, beet-, potato- and mountain-AGAs for the 1981–2010 period. A novel approach for the calculation of WB was employed, which combined the FAO-56 method for crop water requirements (CWRs) with sources of available water from precipitation, soil, and groundwater. The computed WB was divided into four categories of soil water availability based on soil hydrolimits and crop features: Categories 1 and 2 with zero or mild occurrence of crop water stress; categories 3 and 4 with intermediate and severe occurrence of crop water stress. The winter crops were affected by water stress to a lesser extent (the area of categories 3 and 4: wheat 20.1%, oilseed rape 14.5%) as compared with spring crops (the area of categories 3 and 4: maize 39.6%, potatoes 41%). The highest water deficit was recorded for all crops in the maize-AGA due to low precipitation and high CWRs. Most available water was revealed to occur in the mountain-AGA. A strong need for the adoption of measures towards the optimization of water regimes on agricultural land was indicated. The present study shows a promising approach for evaluating and proposing changes of area of cultivated crops with the appropriate tillage and agricultural water management in terms of satisfactory crop water requirements.

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PENDUGAAN DEFISIT DAN SURPLUS AIR UNTUK PENGEMBANGAN TANAMAN JAGUNG (ZEA MAYS L.) DI KABUPATEN GORONTALO DENGAN MENGGUNAKAN MODEL SIMULASI NERACA AIR

AGRI-SOSIOEKONOMI ◽

10.35791/agrsosek.11.1.2015.7166 ◽

2015 ◽

Vol 11 (1) ◽

pp. 11

Author(s):

Yunnita Rahim ◽

Johannes E. X. Rogi ◽

Samuel D. Runtunuwu

Keyword(s):

Zea Mays ◽

Water Balance ◽

Simulation Model ◽

Water Deficit ◽

Zea Mays L ◽

Potential Evapotranspiration ◽

Field Studies ◽

Corn Plants

This study aims to apply the water balance simulation model developed by Handoko (1992) for estimating the deficit and surp4lus water for the development of corn plants in the province of Gorontalo. This study was implemented from April to August 2014 in the District of Gorontalo. The study metods included field studies and modeling of water balance using a simulation model by Handoko (1992). The results showed that the period of water deficit was found in August and September where rainfall (Ch) is smaller than potential evapotranspiration (ETP) whereas periods of surplus water in the district of Gorontalo found in January to July and October to December where rainfall (Ch) exceeds potential evepotranspiration (ETP).

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Combination of remote sensing and meteorological data for estimation of crop water requirements in the irrigated perimeter of Tadla in Morocco

10.5194/egusphere-egu21-7906 ◽

2021 ◽

Author(s):

Jaouad El Hachimi ◽

Abderrazak El Harti ◽

Amine Jellouli

Keyword(s):

Remote Sensing ◽

Water Resources ◽

Arid Regions ◽

Landsat 8 ◽

Climate Data ◽

Crop Water ◽

Water Requirements ◽

Crop Water Requirements ◽

Irrigated Perimeter ◽

Semi Arid

<p>In arid and semi-arid regions, agriculture is an important element of the national economy, but this sector is a large consumer of water. In a context of high pressure on water resources (climate change, population growth, desertification, etc.), an appropriate management is required. The development of remote sensing tools: temporal, spatial and spectral resolution offers a better opportunity for hydro-agricultural management. The main objective of this study is to combine climate data with that of optical remote sensing in order to estimate crop water requirements in the irrigated perimeter of Tadla. In semi-arid regions, such as Tadla Plain, a large quantity of water is lost by evapotranspiration (ET). The objective of this study is to use a scientific approach based on the modulation of evaporative demand for the estimation of crop water requirements. This approach is based on the FAO-56 method using image data from the Sentinel-2A and Landsat-8 satellites, and climate data: surface temperature, air humidity, wind speed, global solar radiation and precipitation. It also allowed the spatialization of crop water requirements on a large area of irrigated crops during the 2016&#8211;2017 agricultural season. Maps of water requirements have been developed. They show the variability over time of crop development and their estimated water requirements. The results obtained constitute an important indicator of how water should be distributed over the area in order to improve irrigation efficiency and protection of water resources.</p>

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