عنوان مقاله [English]
To study the effects of irrigation regimes and organic fertilizers (compost and vermicompost) on mucilage percentage and some quality characteristics of borago (Borago officinalis) a field experiment was conducted in a split plot arrangement based on randomized complete block design with three replications at the Research Farm, Faculty of Agriculture, University of Zabol, Iran during 2012. Irrigation regimes were S1: 100% FC, as control, S2: 80% FC (moderate stress) and S3: 60% FC (severe stress) and application of organic fertilizers: N1: without fertilizer as control, N2: 40 t.ha-1 compost, N3: 4 t.ha-1 vermicompost were assigned to main plots and sub plots, respectively. The results showed that N, P and K, as well as the amount of chlorophyll a, carotenoid and total chlorophyll content decreased with increasing drought stress, but decreasing effects of fertilizers levels on traits were not high. Stress conditions and application of compost increased sodium percentage. By increasing drought stress, soluble carbohydrates and mucilage percent also increased. Highest mucilage percent (2.37) was obtained from moderate stress treatment. Highest total dry yield (13.48 t.ha-1) was also due to non-stress conditions. This was not significantly different mild stress. Application of organic fertilizers, particularly compost, resulted in greater performance. It can be concluded that acceptable yield of dry borage and higher mucilage percent can be obtained from irrigation at 80 percent field capacity and use of compost in Zabol climatic condition.
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