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Title: | Agronomic and Ecological Evaluation on Growing Water-Saving and Drought-Resistant Rice (Oryza sativa L.) Through Drip Irrigation |
Authors: | Adekoya, Modinat A. Liu, Zaochang Vered, Eli |
Keywords: | drip irrigation water use efficiency drought tolerance soil drainage gas emission rice (Oryza sativa L.) |
Issue Date: | 2014 |
Publisher: | Canadian Center of Science and Education |
Abstract: | A field demonstration trial comparing the growth status, yield ability and water use efficiency of drought-tolerant
rice (Oryza sativa L.) varieties and normal paddy rice variety under drip irrigation and paddy irrigation was carried
out for two years in Shanghai, China. Under drip irrigation, both inbred and hybrid water-saving and drought
resistant rice (WDR) varieties showed better yield capacity than paddy rice varieties tested. WDR varieties under
drip irrigation attained more than 95% of the yield level that is achieved in paddy field, while the paddy varieties
under the same drip condition reached only about 75%.The methane gas emission was obviously decreased under
drip irrigation condition, while the emission of other greenhouse gas like nitrous oxide or carbon dioxide was not
observed significant difference between drip and paddy irrigation. It could be concluded that it is practicable to
grow water saving and drought resistant rice through drip irrigation. Drip irrigation maintained a competitive grain
yield and water productivity, and greatly reduced pollution risk to the environment. Considering the conservative
amount of fertilizer application, less than the amount of fertilization in normal paddy field, the yield potential of
rice could be improved by increasing the amount of fertilizer as top application in drip irrigation system. |
Description: | Rice (Oryza sativa L.) is one of the most important food crops in the world which is mainly grown in Eastern and
Southern Asia. It is grown in a wide range of environments and productive in many situations where other crops
would fail. Rice-growing environments are based on their hydrological characteristics which include irrigated, rain
fed lowland, upland. Water - nature’s gift to mankind is not unlimited and free forever. The amount of water
present in the universe is only about 1520 million cubic kilometers, 97% is ocean and sea water, 2% is frozen arctic
waters and only 1% is water in lakes, rivers and underground water, which is portable water for direct use to
humans (Shaker, 2004). However rice farming consumes about 50% of water resources used in all economic
activities (Fan et al., 1996; FAO, 2010; World Bank, 2010), which is taken as the largest consumer of water
resources. |
URI: | http://repository.fuoye.edu.ng/handle/123456789/1290 |
ISSN: | 1916-9752 |
Appears in Collections: | Department of Plant Science Journal Publications
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