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首页> 外文期刊>Plant and Soil >Alleviating soil sickness caused by aerobic monocropping: responses of aerobic rice to soil oven-heating
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Alleviating soil sickness caused by aerobic monocropping: responses of aerobic rice to soil oven-heating

机译：缓解有氧单作造成的土壤病：好氧稻米对土壤烤箱加热的响应

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Aerobic rice system is the cultivation of nutrient-responsive cultivars in nonflooded and nonsaturated soil under supplemental irrigation. It is intended for lowland areas with water shortage and for favorable upland areas with access to supplementary irrigation. Yield decline caused by soil sickness has been reported with continuous monocropping of aerobic rice grown under nonflooded conditions. The objective of this study was to determine the growth response of rice plant to oven heating of soil with a monocropping history of aerobic rice. A series of pot experiments was conducted with soils from fields where rice has been grown continuously under aerobic or anaerobic (flooded) conditions. Soil was oven heated at different temperatures and for various durations. Plants of Apo, an upland variety that does relatively well under the aerobic conditions of lowland, were grown aerobically without fertilizer inputs in all six experiments. Plants were sampled during vegetative stage to determine stem number, plant height, leaf area, and total biomass. Heating of soil increased plant growth greatly in soils with an aerobic history but a relatively small increase was observed in soils with a flooded history as these plants nearly reached optimum growth. A growth increase with continuous aerobic soil was already observed with heating at 90pC for 12 h and at 120pC for as short as 3 h. Maximum plant growth response was observed with heating at 120pC for 12 h. Leaf area was most sensitive to soil heating, followed by total biomass and stem number. We conclude that soil heating provides a simple and quick test to determine whether a soil has any sign of sickness that is caused by continuous cropping of aerobic rice.
机译：有氧水稻系统是在补充灌溉条件下在非淹没和非饱和土壤中培养对营养敏感的栽培品种。它适用于缺水的低地地区和适合补充灌溉的高地地区。据报道，由于在非淹水条件下种植的有氧水稻连续单作，土壤病引起的产量下降。这项研究的目的是确定水稻植物对有氧水稻单作历史的土壤烤箱加热的生长响应。在有氧或无氧（淹水）条件下连续种植水稻的土壤中进行了一系列盆栽试验。将土壤在不同温度下用烤箱加热并持续不同的时间。 Apo是一种高地品种，在有氧条件下的低地条件下表现相对较好，在所有六个实验中均需氧生长且无肥料投入。在营养阶段对植物进行采样，以确定茎数，植物高度，叶面积和总生物量。在有氧历史的土壤中，土壤加热极大地促进了植物的生长，但是在有洪水历史的土壤中，观察到相对较小的增长，因为这些植物几乎达到了最佳生长。在90pC加热12 h和120pC加热短至3 h的情况下，已经观察到连续需氧土壤的生长增加。在120pC加热12 h时观察到最大的植物生长响应。叶面积对土壤加热最敏感，其次是总生物量和茎数。我们得出的结论是，土壤加热提供了一种简单而快速的测试，可以确定土壤是否有由于连续种植好氧水稻而引起的任何疾病迹象。

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