Do abiotic factors cause a gradual yield decline under continuous aerobic rice cultivation? : A pot experiment with affected field soils(Soil Fertility)
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概要
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Aerobic rice is a water-saving technology in which rice grows in non-puddled and non-saturated (aerobic) soil without ponded water. A gradual decline in rice yield was found in field plots at the farm of the International Rice Research Institute, Los Banos, Philippines, where rice has been cultivated continuously for 10 cropping seasons under aerobic rice conditions. We investigated whether abiotic soil factors lead to the observed yield decline. An aerobic rice pot experiment was conducted using field soils from flooded rice plots and from the 10-season-long aerobic rice cultivated plots (referred to as 1st-season and 11th-season aerobic rice, respectively). Subtreatments consisted of soil sterilization by oven heating (at 95℃ or higher for 24h) and a control treatment. The above-ground biomass of 1st-season aerobic rice was significantly greater than that of 11th-season aerobic rice in both the oven-heating and control treatments. Oven heating increased soil N availability and above-ground biomass accumulation over the control in both 1st-season and 11th-season aerobic rice, but the above-ground biomass in the oven-heated 11th-season aerobic rice was still significantly lower than that of the oven-heated and even the untreated (control) 1st-season aerobic rice. These results suggest that abiotic factors contribute to the gradual yield decline observed in the field plots.
- 社団法人日本土壌肥料学会の論文
著者
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NIE Lixiao
Crop Physiology and Production Center (CPPC), MOA Key Laboratory of Huazhong Crop Physiology, Ecolog
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PENG Shaobing
Crop and Environmental Sciences Division, International Rice Research Institute
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BOUMAN Bas
Crop and Environmental Sciences Division, International Rice Research Institute
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Nie Lixiao
Crop Physiology And Production Center (cppc) Moa Key Laboratory Of Huazhong Crop Physiology Ecology
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Nie Lixiao
Irri:huazhong Agric. Univ.
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Bouman Bas
Crop And Environmental Sciences Division International Rice Research Institute
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Peng Shaobing
Crop And Environmental Sciences Division International Rice Research Institute
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Bouman Bas
Crop And Environmental Sciences Division International Rice Research Institute (irri)
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Rodriguez Reynaldo
Crop And Environmental Sciences Division International Rice Research Institute
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Rodriguez Reynaldo
国際稲研究所(irri)
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Agbisit Ruth
Crop And Environmental Sciences Division International Rice Research Institute
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Sasaki Yuka
Crop And Environmental Sciences Division International Rice Research Institute:faculty Of Agricultur
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Hosen Yasukazu
Crop And Environmental Sciences Division International Rice Research Institute:japan International R
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Nie Lixiao
Crop And Environmental Sciences Division International Rice Research Institute (irri)
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FERNANDEZ Luzviminda
Crop and Environmental Sciences Division, International Rice Research Institute
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Sasaki Yuka
Crop And Environmental Sciences Division International Rice Research Institute
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Fernandez Luzviminda
Crop And Environmental Sciences Division International Rice Research Institute
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