scholarly journals GROWTH AND PRODUCTIVITY OF SUGARCANE VARIETIES UNDER VARIOUS IRRIGATION LEVELS

2016 ◽  
Vol 29 (4) ◽  
pp. 945-955
Author(s):  
CICERO TEIXEIRA SILVA COSTA ◽  
JOÃO CARLOS CURY SAAD ◽  
HÉLIO MOREIRA DA SILVA JÚNIOR
Keyword(s):  
Experimental Design ◽  
Flow Rate ◽  
Dry Matter ◽  
Irrigation System ◽  
Crop Evapotranspiration ◽  
Area Index ◽  
Sugarcane Varieties ◽  
Industrial Productivity ◽  
Subsurface Drip ◽  
Irrigation Levels

ABSTRACT This study evaluated the growth and agro-industrial productivity of sugarcane varieties subjected to different irrigation levels in the county of Penápolis - São Paulo, Brazil. The experimental design was a randomized block with a factorial arrangement of 2 × 7 (two cultivars of sugarcane: RB965902 and RB855453, at seven irrigation levels: L0 = 0%, L1 = 25%, L2 = 50%, L3 = 75%, L4 = 100, L5 = 125% e L6 = 150% of crop evapotranspiration - ETc) with four replicates. The irrigation system was a subsurface drip at a flow rate of 1.4 Lh-1. The variables evaluated were tillering, culm length, leaf area index (LAI), dry matter, and industrial productivity. The maximum number of plants per linear meter was 30 for variety RB965902 at 100% ETc, and 29 for variety RB855453 at 125% of ETc. Maximum tillering occurred at 120 and 150 days after planting (DAP) for RB965902 and RB855453, respectively. The maximum LAI of BR965902 was 9.57 at 210 DAP and 9.81 at 201 DAP for the RB855453 variety. The RB855453 variety produced an average of 178.93 t ha-1 with irrigation and 164.81 t ha-1 without, while the variety RB965902 produced 164.08 t ha-1 and 154.61 t ha-1 with and without irrigation, respectively. At harvest, the total recoverable sugars (TRS) were 129.62 kg t-1 for RB965902 and 131.63 kg t-1 for RB855443. The RB855453 variety produced on average 14.19 t ha-1 more than the RB965902 variety.

scholarly journals Ratoon sugarcane yield integrated drip-irrigation and nitrogen fertilization

2013 ◽  
Vol 33 (6) ◽  
pp. 1124-1133 ◽  
Author(s):  
Raúl A. M. Uribe ◽  
Glauber J. de C. Gava ◽  
João C. C. Saad ◽  
Oriel T. Kölln
Keyword(s):  
Experimental Design ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Irrigation System ◽  
N Fertilizer ◽  
Dry Matter Accumulation ◽  
Production Potential ◽  
Sugarcane Yield ◽  
Ratoon Sugarcane ◽  
Subsurface Drip

The aim of this study was to compare the use of water and nitrogen on ratoon sugarcane during irrigated and rain-fed conditions, and to assess the production potential of stalks and sugar with different rates of N-fertilizer on the subsurface drip-irrigated management. The experimental design was a randomized block with four replications for each experiment and treatments: (T1) irrigated, 0kg N ha-1; (T2) irrigated, 70kg N ha-1; (T3) irrigated, 140kg N ha-1; (T4) irrigated, 210kg N ha-1; (T5) not irrigated, 0kg N ha-1, and (T6) not irrigated, 140kg N ha-1. Biometric, technological, dry matter and yield variables were analyzed among the treatments. The irrigation system together with the application of N-fertilizer at 140kg ha-1 presented significant differences in dry matter accumulation of shoots, and for the production of stalks and sugar, respectively 94, 105 and 106%, higher when compared to the not irrigated, without N-fertilizer (T5). There was a positive and synergistic effect of irrigation with N-fertilizer on the productivity of stalks and sugar. Ratoon sugarcane irrigated with subsurface dripping had the highest yield (22Mg ha-1 of sugar) with the dosage of 140kg ha-1 N.

scholarly journals DESENVOLVIMENTO DO TOMATEIRO INDUSTRIAL EM RESPOSTA A DIFERENTES NÍVEIS DE IRRIGAÇÃO

Irriga ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 432-448
Author(s):  
Cícero José da Silva ◽  
José Antônio Frizzone ◽  
César Antônio da Silva ◽  
Nadson de Carvalho Pontes ◽  
Luiz Felipe Mariano da Silva ◽  
...  
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Plant Development ◽  
Tomato Plant ◽  
Dry Mass ◽  
Area Index ◽  
Tomato Plants ◽  
Subsurface Drip ◽  
Irrigation Levels ◽  
E Mail

DESENVOLVIMENTO DO TOMATEIRO INDUSTRIAL EM RESPOSTA A DIFERENTES NÍVEIS DE IRRIGAÇÃO     Cícero José da Silva1; José Antônio Frizzone2; César Antônio da Silva3; Nadson de Carvalho Pontes4; Luiz Felipe Mariano da Silva5 E Ênio Eduardo Basílio6   1Professor do Curso Bacharelado em Agronomia, Instituto Federal Goiano – Campus Morrinhos – GO, BR 153, Km 633, Zonal Rural, CEP;75650-000, Morrinhos – GO, Brasil. E-mail: [email protected] 2Professor Aposentado Colaborador Senior, Departamento de Engenharia de Biossitemas, Escola Superior de Agricultura “Luiz de Queiroz” – Universidade de São Paulo, Avenida Pádua Dias, N 11, Caixa Postal 9, CEP: 13418-900, Piracicaba – SP, Brasil. E-mail: [email protected] 3Professor do Curso Bacharelado em Agronomia, Instituto Federal Goiano – Campus Morrinhos – GO, BR 153, Km 633, Zonal Rural, CEP;75650-000, Morrinhos – GO, Brasil. E-mail: [email protected] 4Professor do Curso Bacharelado em Agronomia, Instituto Federal Goiano – Campus Morrinhos – GO, BR 153, Km 633, Zonal Rural, CEP;75650-000, Morrinhos – GO, Brasil. E-mail: [email protected] 5Estudante de Iniciação Científica do Curso Bacharelado em Agronomia, Instituto Federal Goiano – Campus Morrinhos – GO, BR 153, Km 633, Zonal Rural, CEP;75650-000, Morrinhos – GO, Brasil. E-mail: [email protected] 6Técnico Administrativo, Mestre em Olericultura, Instituto Federal Goiano – Campus Morrinhos – GO, BR 153, Km 633, Zonal Rural, CEP;75650-000, Morrinhos – GO, Brasil. E-mail: [email protected]     1 RESUMO   O objetivo desta pesquisa foi avaliar o desenvolvimento de plantas de tomateiros submetidas a diferentes níveis de reposição da irrigação, aplicados via sistema gotejamento subsuperficial durante duas safras. O experimento foi conduzido no delineamento em blocos ao acaso, com quatro repetições. Foram avaliados cinco níveis de irrigação: 50, 75, 100, 125 e 150% da evapotranspiração da cultura (%ETc) medida com lisímetros de pesagem, sobre o desenvolvimento de plantas de tomateiro. Cada parcela experimental foi composta por três fileiras de plantas de 5,5 m de comprimento, espaçadas a 1,10 m entre si e 0,30 m entre plantas. As avaliações de área foliar, índice de área foliar, massa seca de raiz, caule, folhas, flores, frutos e total foram realizadas aos 45, 65 e 85 dias após o transplante das mudas. Irrigações deficitárias e em excesso prejudicaram o desenvolvimento vegetativo das plantas de tomateiro. Os maiores valores de área foliar, índice de área foliar e massa seca total das plantas de tomateiro foram estimados com níveis de irrigação que variaram de 96 a 112% da ETc, variando de acordo com o ano de avaliação e a fase de desenvolvimento do tomateiro. Irrigações deficitárias e excessivas prejudicaram a floração e frutificação do tomateiro híbrido BRS Sena.             Palavras-chave: Solanum lycopersicom L.; gotejamento enterrado; manejo da irrigação; massa seca.             Silva, c. j. da; FRIZZONE, J. A.; SILVA, C. A. da; pontes, n. de C.; SILVA, L. F. M. da; BASÍLIO, Ê. E. Industrial tomato plant development in response to different irrigation levels    2 ABSTRACT   This research aimed to evaluate tomato plant development submitted to different irrigation replacement levels, irrigated via subsurface drip system for two harvests. The experiment was conducted under a randomized complete block design with four replications. Five irrigation levels were evaluated: 50, 75, 100, 125 and 150% of crop evapotranspiration (% ETc) measured with weighing lysimeters over the tomato plants development. Each experimental plot was composed of three plants rows with 5.5 m long, spaced 1.10 m apart and 0.30 m between plants. Leaf area, leaf area index, root dry matter, stem, leaves, flowers, fruits and total were evaluated at 45, 65 and 85 days after seedlings transplanting. Deficit and excess irrigation impaired the vegetative development of tomato plants. The highest values of leaf area, leaf area index and plants total dry mass were estimated with irrigation levels ranging from 96 to 112% of ETc, depending on the evaluation harvest year and the crop development phase. Deficit and excessive irrigation affected the flowering and fruiting of the hybrid tomato BRS Sena.   Keywords: Solanum lycopersicom L; subsurface drip irrigation; irrigation manegement; dry mass.

scholarly journals Performance of processing tomatoes under different supply levels of crop evapotranspiration

2018 ◽  
Vol 36 (3) ◽  
pp. 299-305
Author(s):  
Cícero J Silva ◽  
Nadson C Pontes ◽  
Adelmo Golynski ◽  
Marcos B Braga ◽  
Alice M Quezado-Duval ◽  
...  
Keyword(s):  
Irrigation System ◽  
Block Design ◽  
Water Productivity ◽  
Irrigation Management ◽  
Crop Evapotranspiration ◽  
Production Chain ◽  
Crop Cycle ◽  
Growing Conditions ◽  
Irrigation Levels

ABSTRACT Irrigation management is essential to promote appropriate plant growth and guarantee production and quality of the tomatoes for processing, increases the efficiency of nutrients use and contributes to ensure the sustainability of the production chain. This study was installed to evaluate productive performance of two processing tomato hybrids submitted to five water depths under drip irrigation system. Five levels of crop evapotranspiration (ETc) replacement (60%, 100%, 140%, 180% and 220%) and two tomato hybrids (BRS Sena and H 9992) were tested. The experimental design was a 5×2 factorial arranged in randomized complete block design with four replications. During the crop cycle, hybrids BRS Sena and H 9992 needed 692.20 and 418.43 mm of water, yielding 80 and 44.06 t ha-1, respectively. For both hybrids, the higher water productivity was observed when lower levels of irrigation were applied. Higher productivities and pulp yields of ‘BRS Sena’ and ‘H 9992’ were noticed when replacing 150-166% and 99-101% ETc, respectively. We observed that improving the performance of processing hybrid tomatoes is possible by adjusting irrigation levels for each hybrid according to growing conditions.

scholarly journals Radiation Use Efficiency for Cowpea Subjected to Different Irrigation Depths Under the Climatic Conditions of the Northeast Of Pará State

2018 ◽  
Vol 33 (4) ◽  
pp. 579-587
Author(s):  
Denis de Pinho Sousa ◽  
Paulo Jorge Oliveira Ponte de Souza ◽  
Vivian Dielly da Silva Farias ◽  
Hildo Giuseppe Caldas Nunes ◽  
Denílson Pontes Ferreira ◽  
...  
Keyword(s):  
Water Deficit ◽  
Dry Matter ◽  
Climatic Conditions ◽  
Radiation Use Efficiency ◽  
Crop Evapotranspiration ◽  
Area Index ◽  
Active Radiation ◽  
Use Efficiency ◽  
Radiation Use ◽  
Absorbed Photosynthetically Active Radiation

Abstract This study aims to determine the cowpea efficiency in absorbing and using solar radiation according to different irrigation depths under the climatic conditions of the northeast of Pará State. The experiment was carried out on 2014 and 2016 in an experimental design of randomized blocks, which consisted in six blocks with four treatments, in which different irrigation depths the reproductive phase were applied, as follows: T100, T50, T25 e T0, that corresponded to 100%, 50%, 25% e 0% of the crop evapotranspiration, respectively. The absorbed photosynthetically active radiation, leaf area index (LAI), total aerial dry matter (TADM) and grain yield were measured. The extinction coefficient (k) was obtained by nonlinear regression between the fraction of absorbed PAR (fPARinter) and the LAI. The radiation use efficiency (RUE) was calculated by linear regression between the TADM and the accumulated absorbed PAR. The water deficit imposed by the treatments had a significant influence on the LAI, TADM and cowpea yields. The water deficit did not significantly influenced k – it ranged between 0.83 for T100 and 0.70 for T0. The RUE showed significant behaviors regarding the treatments with adequate water supply and treatments under water deficit, ranging from 2.23 to 1.64 g·MJ-1, respectively.

scholarly journals Characterization of a “New Greenhouse Model”: with and without insect proof-screen

2017 ◽  
Vol 11 ◽  
Author(s):  
Luigi Santonicola ◽  
Antonietta Napolitano ◽  
Francesco Castelluccio ◽  
Barbara Greco ◽  
Michele De Maio ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Dry Matter ◽  
Natural Ventilation ◽  
Crop Evapotranspiration ◽  
Fresh Matter ◽  
Area Index ◽  
Reference Crop Evapotranspiration ◽  
Plant Parts ◽  
Reference Crop

In the " Natural ventilation greenhouse", patented new greenhouse model which maximizes the natural ventilation and allows stable installation of the anti-insect proof-screen. The effects of the presence or absence of the anti-insect proof-screen are compared on different parameters of the soil (moisture, pH, EC (Electrical Conductivity), nitrates), of greenhouse environment (irradiance, Hargreaves-Samani ETo (reference crop evapotranspiration)) and of plant (fresh matter, dry matter, Leaf Area Index (LAI)). The presence of the insect proofscreen reduces the water needs of tomato, in fact soil moisture, water delivered and ETo are significantly lower compared to the greenhouse without an insect proof-screen, also it reduces the EC and nitrates in the soil. It improves LAI, doubles the amount of fresh matter of plant parts and triples the fresh matter of the productive part with respect to the greenhouse without anti-insect proof-screen.

scholarly journals ROLE OF COMPOST AND IRRIGATION WATER QUANTITY ON SOME PHYSICAL PROPERTIES OF SOIL UNDER SURFACE, SUBSURFACE DRIP IRRIGATION

2020 ◽  
Vol 51 (5) ◽  
pp. 1300-1307
Author(s):  
Al-Shamari & et al.
Keyword(s):  
Physical Properties ◽  
Irrigation Water ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Block Design ◽  
Subsurface Drip Irrigation ◽  
Subsurface Drip ◽  
Irrigation Levels ◽  
Properties Of Soil

A field experiment was conducted in Ramadi district - Al-Anbar province during the autumn season of 2018. to study the role of compost (sheep residues) and irrigation levels in some physical properties of soil and water consumption a potato under surface and subsurface drip irrigation system. Randomized Complete Block Design (RCBD) in arrangement of a split- split-plot with  three replication were used.The results showed that the addition of 10 Mg.h-1  resulted in a significant decrease in bulk density (BD) values of 1.12 Mg m-3, and increase in the values of (MWD) and (Ks) to reach 1.47 mm and 10.3 cm. hr -1 respectively. The addition of 50% of the NID reduced the BD to 1.24 Mg m-3, The MWD and SHC were significantly higher to reach 1.24 mm and 8.1 cm hr-1 respectively. WHC increased with increasing of amount of irrigation water as it reached the highest value of 265.66 mm season-1 when adding 100% of the NID. The BD values decreased, whereas MWD and SWC increased under subsurface irrigation (SUBDI) treatment to be 1.23 Mg m-3, 1.24 mm and 8.4 cm hr-1, respectively.

scholarly journals Assessment of improving irrigation efficiency for tomatoes planted in greenhouses in Lam Dong Province, Vietnam

2021 ◽  
Vol 22 (1) ◽  
pp. 52-55
Author(s):  
SEUNG KYU LEE ◽  
TRUONG AN, DANG ◽  
MY LINH THI NGO
Keyword(s):  
Leaf Area ◽  
Irrigation Water ◽  
Irrigation System ◽  
Water Levels ◽  
Crop Evapotranspiration ◽  
Area Index ◽  
Tomato Plants ◽  
Crop Growth Rate ◽  
The Right ◽  
Agricultural Film

This study was conducted to investigate the developmental processes of tomato plants in greenhouses covered with polyethene agricultural film that applied a smart irrigation system. The study tested applying different irrigation water levels (IWLs) of 60, 80, 100, and 120% of crop evapotranspiration (ETc). Based on the findings for the tomato rows sampled to collect information about leaf area, biomass, and yield, maximal growth of tomatoes varied from 80 to 90 days after transplanting (DAT) for all IWLs. Among the applied IWLs, approximately 80% of ETc was recorded as the most appropriate for the crop growth rate (CGR), leaf area index (LAI), and yield, while the IWLs with 60%, 100%, and 120% of ETc also gave an equivalent output. The results of this work can provide useful information for farmers to make the right decisions about the amount of irrigation water to use.

scholarly journals INTERAÇÃO DE NÍVEIS DE ÁGUA E DENSIDADE DE PLANTAS NO CRESCIMENTO E PRODUTIVIDADE DO FEIJÃO-CAUPI, EM TERESINA, PI

Irriga ◽  
2015 ◽  
Vol 20 (3) ◽  
pp. 502-513 ◽  
Author(s):  
Simone Raquel Mendes de Oliveira ◽  
Aderson Soares de Andrade Júnior ◽  
Valdenir Queiroz Ribeiro ◽  
Ramilos Rodrigues de Brito ◽  
Marcus Willame Carvalho
Keyword(s):  
Leaf Area ◽  
Vigna Unguiculata ◽  
Dry Matter ◽  
Plant Density ◽  
Irrigation System ◽  
Growth And Yield ◽  
Water Plant ◽  
Plant Densities ◽  
Pod Length ◽  
Irrigation Levels

INTERAÇÃO DE NÍVEIS DE ÁGUA E DENSIDADE DE PLANTAS NO CRESCIMENTO E PRODUTIVIDADE DO FEIJÃO-CAUPI, EM TERESINA, PI  SIMONE RAQUEL MENDES DE OLIVEIRA1; ADERSON SOARES DE ANDRADE JÚNIOR2; VALDENIR QUEIROZ RIBEIRO3; RAMILOS RODRIGUES DE BRITO4 E MARCUS WILLAME CARVALHO5 1Eng. Agrônoma, Doutora em Engenharia Agrícola, Professora Colégio Técnico de Teresina, Teresina – PI, e-mail: [email protected]. Agrônomo, Doutor em Irrigação e Drenagem, Pesquisador da Embrapa Meio-Norte, Teresina – PI.3Eng. Agrônomo, Mestre em Estatística Experimental, Pesquisador da Embrapa Meio-Norte, Teresina – PI.4Eng. Agrônomo, Doutorando em Irrigação e Drenagem, UNESP/FCA, Botucatu – SP.5Eng. Agrônomo, Mestre em Irrigação e Drenagem, CCA-UFPI, Teresina – PI.  1 RESUMO O objetivo desse trabalho foi avaliar a influência de níveis de água e densidade de plantas no crescimento (matéria seca e área foliar) e produtividade do feijão-caupi (Vigna unguiculata L. Walp.). O experimento foi conduzido na área experimental da Embrapa Meio-Norte, localizada no município de Teresina, Piauí - Brasil, no período de julho a setembro de 2012. O solo local foi classificado como Argissolo Vermelho-Amarelo de textura franco-arenosa. Utilizou-se o delineamento experimental em blocos casualizados, com quatro repetições. Os tratamentos foram arranjados num esquema fatorial 5 x 4, sendo os fatores cinco níveis de irrigação: 393,53; 340,34; 300,50; 260,39 e 201,73 mm, aplicados por meio de um sistema de irrigação por aspersão convencional, e quatro densidades de plantas: 150.000; 200.000; 250.000; 300.000 plantas ha-1. Apenas na matéria seca não houve interação significativa entre os níveis de irrigação e densidade de plantas. A área foliar, produtividade de grãos, número de vagens por planta, massa de vagens, produtividade de vagens, comprimento de vagem e massa de cem grãos que apresentaram valores máximos de: 1.301,89 cm²; 1.668,86 kg ha-1; 2,24; 2.248,16 kg; 1.873,45 kg ha-1; 18,70 cm e 22,72 g, alcançados com as lâminas de: 367,86; 390,88; 393,53; 393,53; 393,53; 348,40 e 322,63 mm associados às densidades de: 188.000; 241.000; 110.000; 254.000; 254.000; 223.000 e 300.000 plantas.ha-1, respectivamente. Palavras-chave: estresse hídrico, adensamento, competição intraespecífica.  OLIVEIRA, S. R. M. de; ANDRADE JÚNIOR, A. S. de; RIBEIRO, V. Q.; BRITO, R. R. de; CARVALHO, M. W. INTERACTION BETWEEN LEVELS OF WATER AND PLANT DENSITY ON GROWTH AND YIELD OF COWPEA IN TERESINA, PI   2 ABSTRACT The objective of this study was to evaluate the effect of levels of water, plant density and their interaction  on growth (dry matter and leaf area) and yield of cowpea (Vigna unguiculata L. Walp.). The experiment was carried out at the experimental area of Middle- North Embrapa in Teresina city, Piauí-Brazil from July to September 2012 in a Ultisol soil.  A randomized block experimental design was used with four replicates.  Treatments were applied in a   5 x 4 factorial design and 5 levels of irrigation as factors:  393.53; 340.34; 300.50; 260.39 and 201.73 mm applied through  an irrigation system by conventional sprinkler, and four plant densities:  150,000; 200,000; 250,000; 300,000 plants ha-1. A significant interaction between irrigation levels and plant density was found in all study parameters except for dry matter.  Leaf area, grain yield, number of pods per plant, pod weight, pod yield, pod length and hundred grain weight had maximum values of   1,301.89 cm²;  1,668.86 kg ha-1; 2.24; 2,248.16 kg; 1,873.45 kg ha-1; 18.70 cm and 22.72 g,  which were reached using the following  water depths:   367.86; 390.88; 393.53; 393.53; 393.53; 348.40 and  322.63 mm associated with densities of : 188,000; 241,000; 110,000;254,000; 254,000; 223,000 and  300,000 plants.ha-1 , respectively. Keywords: water stress, density, intraspecific competition. 

scholarly journals INITIAL DEVELOPMENT OF COFFEE SEEDLINGS IN THE PRESENCE OF PLANT EXTRACTS

2020 ◽  
Vol 7 (3) ◽  
pp. 53-58
Author(s):  
Bruna Penha Costa ◽  
José Barbosa Duarte Júnior ◽  
Luanna Karoline Rinaldi ◽  
Carlos Augusto Rocha De Moraes Rego ◽  
José Renato Stangarlin
Keyword(s):  
Experimental Design ◽  
Plant Extracts ◽  
Dry Matter ◽  
Early Growth ◽  
Aqueous Extracts ◽  
Coffee Plant ◽  
Area Index ◽  
Initial Development ◽  
Agronomic Character ◽  
Best Response

The coffee plant can grow together with different plants, but the presence of allelochemicals can affect the crop post-planting. This study aimed to evaluate the early growth of coffee seedlings following treatment with plant extracts from different botanical families. The experimental design used randomized blocks with four trials, in a 7 × 2 factorial scheme; the first factor consisted of aqueous extracts from six species: canola, crotalaria, brachiaria, sunflower, wheat, and lupine; water was used as the control. The second factor comprised of different botanical parts of the aforementioned six species of plant. The extracts were diluted to 5% concentration and were applied at a dose of 20 mL per plant. The agronomic variables analyzed were plant height (PH), stem diameter (SD), leaf area index (LAI), leaf dry matter (LDM), root dry matter (RDM), and root length (RL). Compared to the canola extract, the application of brachiaria extract resulted in the best response in PH, regardless of the botanical part that constituted the extract, leading to an increase in PH by 3.77 cm. The agronomic character most sensitive to the application of aqueous extracts was PH, in which the brachiaria extract was prominent in inducing the greatest growth, whereas the canola extract hindered the initial development of Arabica coffee seedlings.

scholarly journals EFFECTIVENESS OF EMITTER FLUSHING USED FOR SUBSURFACE DRIP IRRIGATION SYSTEM

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Vinod Kumar Tripathi ◽  
Birendra Bharti ◽  
Pratibha Warwade ◽  
Sushil Kumar Shukla ◽  
Prabeer Kumar Parhi
Keyword(s):  
Water Quality ◽  
Flow Rate ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Quality Parameters ◽  
Filtration Efficiency ◽  
Water Quality Parameters ◽  
Subsurface Drip Irrigation ◽  
Drip Irrigation System ◽  
Subsurface Drip

Filtration plays vital role to improve the efficacy and reduce the maintenance of drip irrigation systems. The experiment was conducted to evaluate drip irrigation filters (gravel, disk filter and their combination) for groundwater filtration. Water quality parameters responsible for emitter plugging, such as total solids, turbidity, Ca, Mg, CO3 and HCO3 were analyzed at the entry and exit points of filters. The filtration efficiency for water quality parameters was estimated with individual filters and in combination. Significant improvement was observed for turbidity, total solids, carbonate and bicarbonate. The filtration efficiency with combination filter was 14.3±8.8% for turbidity and 16.3±9.31% for bicarbonates. Gravel filter gave better results for filtration of bicarbonate in comparison to the disk filter. Emitters protected by the gravel media filter experienced the largest flow rate reductions but emitters protected by combination filters experienced least flow rate reduction. Backwashing of filters reduces the filtration efficiency and head loss. To reduce emitter plugging by removal of accumulated sediment, flushing of mains, submains and laterals are recommended. Higher improvement in uniformity coefficient was observed in subsurface drip after flushing operation. The results may be utilized in planning and design of subsurface drip irrigation system to diminish emitter clogging incidence.

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