کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6363480 1622909 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Growth, fruit yield and quality of tomato (Lycopersicon esculentum Mill.) as affected by deficit irrigation regulated on phenological basis
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Growth, fruit yield and quality of tomato (Lycopersicon esculentum Mill.) as affected by deficit irrigation regulated on phenological basis
چکیده انگلیسی


- The regulated deficit irrigation (RDI0.8) did not affect the marketable fruit yield (MFY) as compared with the full irrigation (FI).
- The MFY was improved by 4% with DI0.6 at vegetative stage while a decline of 7% was monitored with DI0.6 at fruiting stage.
- The DI0.6 applied at either of two stages vegetative & flowering, flowering & fruiting and vegetative & fruiting resulted in 14-18% decline in MFY.
- The crop was able to tolerate interruptions of irrigation for 15 days at three growth stages and the decline in yield was only 3-7%.
- The Deficit irrigation (DI) improved the quality of tomato in terms of total soluble solid, ascorbic acid, acidity and colour index.

A field experiment was conducted for two years (2013-15) to evaluate the response of tomato (Lycopersicon esculentum Mill.) to deficit irrigation (DI) with drippers. The options tried were either the regulated DI on the basis of climatological approach i.e. irrigation water equalling 0.6, 0.8 and 1.0 times the evapotranspiration (ET) or DI (0.6xET) at phenological stages (vegetative, flowering, fruiting, vegetative-cum-flowering, vegetative-cum-fruiting and flowering-cum-fruiting stages) and disrupting irrigation (15 days) at either of vegetative, flowering and fruiting stage. Compared with the full irrigation (FI; 78.0 Mg ha−1) the regulated deficit irrigation though did not affect the marketable fruit yield (MFY) at RDI0.8, there was loss of about one-fourth MFY with RDI0.6. Nevertheless the water productivity (19.2 kg m−3) was the maximum under RDI0.8. When the deficit irrigation was applied at different growth stages, MFY was rather improved by 4% with DI0.6(VS) while DI0.6(FL) showed little effect and a decline of 7% was monitored with DI0.6(FT). The DI applied at either of two stages (DI0.6(VS + FL); DI0.6(FL + FT); DI0.6(VS + FT)) resulted in 14-18% decline in MFY. The crop was able to tolerate interruptions of irrigation for 15 days at the above phenological stages i.e. simulating canal closures and the decline in yield was only 3-7%, the highest being at fruiting stages (IIFT). The major advantage of DI was improvement in quality in terms of total soluble solid, ascorbic acid, acidity and colour index (lycopene) though the fruit size was affected. It was concluded that benefits of deficit irrigation in terms of improved quality and water productivity while sustaining fruit yield could be achieved with regulated DI at 0.8xET and DI at 0.6xET during vegetative stage followed by flowering.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Water Management - Volume 171, June 2016, Pages 73-79
نویسندگان
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