ABSTRACT

Water logging is an important abiotic stress which affects seriously for growth and development of brinjal production. To find out adverse effect of water logging on vegetative growth and fruit yield of brinjal a pot experiment was conducted on Jute Agriculture Experimental Station, Bangladesh Jute Research Institute, Jagir, Manikganj. Thirty days old healthy brinjal plants were subjected to continuous flooding stress of different durations 0, 3, 6, 9 and 12 days. Earthen pots healthy brinjal plants were placed inside a larger concrete chamber and irrigated with tap water so that the water logging depth was maintained within 4-5 cm throughout the experimental period. Morphological parameters recorded include plant height, number of leaves, stem base diameter, leaf area, days to flowering and number of fruits per plant. Among three brinjal varieties Singnath perform better considering fruit production per plant. All the studied characters perform better at no water logging condition whereas the lowest performances at 12 days of water logging condition.

Key words: Brinjal, water logging stress, growth parameters, and fruit yield.

Introduction

 Brinjal (Solanum melongena L.) is a most important, inexpensive hot-weather vegetable that is commonly grown in tropical and subtropical regions all over the world. It is one of the popular vegetables and highly cultivated and consumed in Asia countries specially Bangladesh. This plant is indigenous to India and is found throughout Asia, with China serving as a secondary source of origin. Furthermore, in terms of acreage and production, brinjal is the second most important vegetable crop after potato, and the most important traditional vegetable in Bangladesh (Sabina et al., 2021). According to the Bangladesh Bureau of Statistics (BBS), it is cultivated by roughly 150,000 poor farmers on 50,955 hectares, with a total yield of 507,000 metric tons in 2018. In term of nutrition value of the brinjal, nutrients, minerals, antioxidants, vitamins, dietary fiber, and body-building components and proteins are abundant in it. Hence, Brinjal has a high nutritional content that is comparable to tomato (Choudhary, 1976). It also contains 0.7 milligrams of iron, 13.0 milligrams of sodium, 213.0 milligrams of potassium, 12.0 milligrams of calcium, 26.0 milligrams of phosphorus, 5.0 milligrams of ascorbic acid, and 0.5 milligrams of vitamin A per 100 gram serving, and offers 25.0 calories (Saeedifar et al., 2014). China, India, Egypt, Turkey, and Iran are the top five brinjal producers, with production of 28.4, 13.4, 1.2, 0.82, and 0.75 million tons, respectively (Taher et al., 2017). In Bangladesh, an average yield of 10.00 tons per hectare has been recorded which is comparatively lower than that produced by the other countries (Anon, 2017). In Bangladesh, brinjal can be grown all year in Bangladesh, but it is most productive during the winter months. It should be grown in well-fertilized soil with plenty of compost for maximum yields (Hossain, 2013). Although several types of varieties of the brinjal are cultivating in numerous zones of Bangladesh, they have varying yield potentials, and their yield appears to be impacted greatly by several biotic and abiotic stresses (Sabina et al., 2021). Infestation of diseases and pests are examples of biotic factors, while drought, water logging, salinity, cold and heat stress are examples of abiotic stresses that reduce productivity (Prabhavathi and Rajan, 2007). As a result of climate change, irregular climate conditions represent a significant threat to humanity, environment and crop production. Main cause of crop losses in worldwide is the environmental stress, reported average yield reduction of major crops by more than 50% (Bray et al., 2000). Global climate change makes the water logging more drastic, frequent and unpredictable (Jackson and colmer, 2005).