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Water saving and productivity benefits of SRI: a study of tank, canal and groundwater irrigated settings in South India

机译：SRI的节水和生产力优势：对印度南部水箱，运河和地下水灌溉设置的研究

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摘要

Paddy, which is predominantly cultivated under the conventional inundation method, is the largest water consuming crop in India. Given looming water scarcity, the inundation method of paddy cultivation is no longer sustainable. A newly introduced method of paddy cultivation, popularly known as the System of Rice Intensification (SRI), is reportedly helping to reduce water consumption and increase land productivity. SRI has now been in practice for some years in India but the various impacts of SRI on water saving, land and water productivity as well as on profitability which are expected to vary in different ecological settings - namely in tank, canal and groundwater irrigated areas - remain largely unexplored. In this study, using data collected from a total sample of 300 farmers from three different settings in Tamil Nadu state, an attempt has been made to fill this gap. The study shows that by adopting the SRI method farmers can save about 40% of irrigation water and increase land productivity by about 46% while reducing the cost of cultivation by 23% over the conventional inundation method. While increasing irrigation water productivity and economic water productivity substantially, SRI also generates an additional profit of Rs 17,169/acre (1 USD = INR 70.12; 1 acre = 4047 m(2)) compared to that realised by non-SRI farmers.
机译：稻田主要采用传统的淹没法种植，是印度最大的耗水作物。鉴于迫在眉睫的水短缺，稻田耕种的淹没方法不再可持续。据报道，一种新近引进的水稻种植方法，即水稻集约化系统（SRI），有助于减少水消耗并提高土地生产率。 SRI在印度已经实施了多年，但是SRI对节水，土地和水的生产率以及对盈利能力的各种影响在不同的生态环境中（例如在储罐，运河和地下水灌溉地区）预计会有所不同-仍未开发。在这项研究中，使用从泰米尔纳德邦三个不同地区的300名农民的样本中收集的数据，试图弥补这一差距。研究表明，采用SRI方法，与传统的淹没法相比，农民可以节省约40％的灌溉水，并使土地生产力提高约46％，同时将耕作成本降低23％。与非SRI农民实现的收益相比，在大幅提高灌溉水生产率和经济水生产率的同时，SRI还产生了每英亩17,169卢比的额外利润（1美元= 70.12印度卢比； 1英亩= 4047 m（2））。

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