|Author:||Kirnak, H. ; Kaya, C. ; Higgs, D. ; Tas, I.|
|Book Group Author:||NA|
The effects of different water regimes and N rates, with or without mulching, on the growth, water use efficiency (WUE), fruit yield and quality, leaf relative water content and macro-nutrition of bell pepper (Capsicum annuum) cv. 11B 14 were determined in a field experiment conducted in Turkey from April to July 2001. Treatments comprised bare soil+water stressed, bare soil+well-watered, and black polyethylene mulch (BPM)+water stressed. Three different N rates viz., 70, 140 and 210 kg/ha were combined with the above treatments. Water stress was created by irrigating plants once every 5 days at 75% A pan evaporation. Control plants received 125% A pan evaporation every other day. Water stress reduced all the parameters measured. BPM covers improved fruit yield, fruit size, plant dry matter, relative water content and chlorophyll concentrations in leaves of bell pepper subjected to stressed treatments and improved N availability in soil by keeping the soil moisture high. BPM increased WUE by ~12% more compared to plants subjected to water stress alone. Water stress enhanced electrolyte leakage by impairing membrane permeability. Mulching substantially decreased electrolyte leakage (EL) in water stressed-plants. High N rate significantly enhanced leaf N in the unstressed and mulched plants. However, high N concentration did not increase leaf N in water-stressed plants. Water stress reduced the concentration of N, P, K, Ca and Mg in the leaves. On the other hand, mulching enhanced the concentrations of these nutrients, although at lower concentrations compared to the control treatment. These results clearly indicate that mulching mitigates the negative effects of water stress on plant growth and fruit yield in field-grown pepper plants particularly in semi-arid conditions while increasing the N availability in the soil for the plants.
|Pages:||263 - 277|
|Journal:||Journal of Plant Nutrition|
application rates, calcium, chlorophyll, crop quality, cropyield, dry matter, fruits, growth, leaves, magnesium, mulching,nitrogen, nitrogen fertilizers, nutrient content, phosphorus, plantnutrition, plant water relations, polyethylene, potassium, soilfertility, trickle irrigation, water content, water stress, water useefficiency, Turkey, Capsicum annuum, Capsicum, Solanaceae, Solanales,dicotyledons, angiosperms, Spermatophyta, plants, eukaryotes, West Asia,Asia, Mediterranean Region, Developing Countries, OECD Countries,polythene, Horticultural Crops (FF003) (New March 2000), PlantComposition (FF040), Plant Nutrition (FF061), Plant Water Relations(FF062), Plant Production (FF100), Soil Fertility (JJ600), Fertilizersand other Amendments (JJ700), Soil Water Management (Irrigation andDrainage) (JJ800) (Revised June 2002) [formerly Soil Water Management],Soil Management (JJ900), Crop Produce (QQ050), Food Composition andQuality (QQ500)