Growth-stage-specific crop coefficient and consumptive use of Capsicum chinense using hydraulic weighing lysimeter

Raphael, O. D. and Ogedengbe, K. and Fasinmirina, J.T. and Okunadea, D. and Akandea, I. and Gbadamosi, A. A. (2018) Growth-stage-specific crop coefficient and consumptive use of Capsicum chinense using hydraulic weighing lysimeter. Agricultural Water Management. pp. 179-185.

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This research was conducted to determine growth stage-specific crop coefficient (Kc) and Consumptive Use (CU), for Capsicum chinense (Ata rodo) grown under irrigation in Omu-Aran, North central Nigeria. Daily CU and growth stage specific crop coefficient Kc for Capsicum chinense was measured using a developed and calibrated hydraulic weighing lysimeterover2consecutivedryseasons(2015/16and2016/17).ThevaluesofCUandgrowthstage-specificKcobtained were compared to that estimated using CROPWAT 8.0 and with existing Food and Agricultural Organization (FAO) Kc valuesforbellpepper.TheKcvaluesdeterminedoverthegrowingseasonsvariedfrom0.32to0.7,1.02to1.45and0.76 to 0.9 representing Kc initial, Kc mid-season and Kc late season (Kcini, Kcmid and Kcend), respectively. These Kc varied significantly (P < 0.05) from FAO established Kc values. The observed Kc was validated using relevant statistical methods.TheseasonalCUof Capsicumchinense was580.01 ± 54mm,whilethereferenceevapotranspirationincreased from3.26mmday−1inOctoberto4.19mmday−1inFebruary.Thecropfactorincreasedfrom0.7inOctobertoattainits peakof1.45inJanuary,butdecreasedto0.9duringcropsenescenceinFebruary.Likewise,thedailycropwaterneedwas 2.28mmday−1inOctoberbutreacheditspeakof5.82mmday−1inJanuaryandthereafterdecreasedto3.77mmday−1 inFebruary.Meanmonthlywaterneedof Capsicumchinense pepperwas68.36mmmonth−1 inOctober.Thewaterneed ofcroprosetoitspeakof166.32mmmonth−1 inDecember,andthereafterdeclinedto113.13mmmonth−1 inFebruary Itisinferredthattheapplicationofgrowthstage-specificKcwillassistinirrigationmanagementandwouldserveasuseful guide for precise water applications for areas around Omu-Aran as it differs from region to region.

Item Type: Article
Subjects: S Agriculture > S Agriculture (General)
Date Deposited: 31 Jan 2019 17:12
Last Modified: 16 Sep 2019 10:21

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