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Effect of Ground Water Irrigation on Paddy Rice Yield in Maligaya, Philippines

机译：菲律宾Maligaya地下水灌溉对水稻产量的影响

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摘要

Air and water temperatures ate important climatic variables influencing rice yields through the interaction of pests and nutrients. The Philippine Rice Research Institute (PhilRice) in Maligaya, central region of Luzon island, stated that the Philippines could attain rice sufficiency if farmers' average yield increases to at least 1 t/ha. It is generally said that decreasing the minimum air temperature in the lice canopy could make a yield increase possible in the Philippines Instead, results showedthat the timing of irrigation watei application using a shallow tubewell pump in Maligaya could not deciease canopy air temperature. However, the temperature of the standing or flooding water in the field was reduced using pumped water or ground water irrigation compared with the conventional irrigation where water came from irrigation canals, and the lower temperature of the standing water lesulted in an increase in rice yield from 7.27 to 8.58 t/ha for PSB Rc28 rice cultivar and from 3.08 to 4.02 t/hafor New Plant Type IR66106-5-3-2-3. Based on this result, this study recommends that rice growers irrigate using pumped water or ground water from 15 : 00 to 17: 00 with a standing water level of 5cm during the reproductive stage to have a lower water temperature at night for better efficiency of water and resistance to white heads.
机译：空气和水的温度是重要的气候变量，通过害虫和养分的相互作用影响水稻的产量。位于吕宋岛中部地区马里加亚的菲律宾水稻研究所（PhilRice）表示，如果农民的平均单产增加到至少1吨/公顷，菲律宾就可以实现水稻的充足。人们普遍认为，降低菲律宾虱子冠层的最低气温可以使菲律宾的单产提高。相反，结果表明，在马里加雅使用浅管井泵进行灌溉瓦蒂的时间不能降低冠层的气温。但是，与常规灌溉相比，使用灌溉水或地下水灌溉降低了田间的死水或洪水温度，传统灌溉的灌溉水来自灌溉渠，而较低的死水温度导致水稻产量增加。 PSB Rc28水稻品种为7.27至8.58 t / ha，IR66106-5-3-2-3新植物类型为3.08至4.02 t / ha。根据此结果，本研究建议水稻种植者在繁殖阶段使用15:00至17:00的抽水或地下水进行灌溉，繁殖期的站立水位为5cm，以降低夜间的水温，从而提高水的利用率。和抗白头。

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