The effects of bio-extract from water hyacinth (Eichhornia crassipes (C. Mart.) Solms) and golden apple snail (Pomacea canaliculata Lamarck) on photosynthetic pigment and ascorbic acid contents of Chinese cabbage (Brassica chinensis var. pekinensis Rupr.

Abstract

This study was aimed to compare the effects of bio-extract from water hyacinth, bio-extract from golden apple snail and the mixture of bio-extract?? on growth and some physiological characteristics of Chinese cabbage that grown in Dynamic Root Floating Technique (DRFT) of hydroponic culture. The bio-extract that filled in nutrient solution was 1: 500 and 1:1000 levels. Data were recorded on days 0, 7, 14, 21, 28 and 35 days after bio-extract treatments. Results of the study revealed that Chinese cabbage that grown in bio-extract from golden apple snail at the ratio of ??????????????????????????1: 1000 had the tendency of producing higher total dry weight. However, the bio-extract from golden apple snail at the ratio of 1: 500 had the tendency of producing higher total chlorophyll, carotenoids and ??-carotene contents. On the other hand, bio-extract from water hyacinth at the ratio 1:500 resulted in increased ascorbic acid contents. Our results indicated that bio-extract affects the growth of Chinese cabbage and can be used as a source of nutrients for crops to reduce used chemicals in hydroponics culture.