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首页> 外文会议>Effective Utilization of Agricultural Soil amp; Water Resources and Protection of Environment >Changes of Soil Potassium as Affected by Different Rice (Oryza Sativa L.)Genotypes Growth
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Changes of Soil Potassium as Affected by Different Rice (Oryza Sativa L.)Genotypes Growth

机译：不同水稻基因型生长对土壤钾素变化的影响

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摘要

The differences of uptake and utilization of soil K by two lowland rice genotypes differed in low-K tolerance and were studied by rhizobox cultivation.The results showed that the depletion ratios of all soil K fractions in the rhizosphere of 81,394,a genotype sensitive to low-K stress,were more serious than those of Fujiandao when K was sufficiently supplied.Under low-K stress,the depletion ratio of the available K in the rhizosphere (＜2mm) of Fujiandao was 91.3%,while it was 82.6% in that of 81,394.The depletion ratio of this K fraction in the soil 10mm far from root surface for Fujiandao was still as high as 83.0%,but it decreased to 53% for 81,394.There were no significant differences between the depletion of readily-released K of two genotypes.The average depletion ratio of slowly-released K in the rhizosphere (＜3mm) of Fujiandao was 56.6%,which was significantly higher than that of 8,139,441.7%.More visible desc.ending of soil pH in the rhizosphere of Fujiandao was found compared to that of 81,394,which might be the result of the more proton secretion adapting to low-K stress,and the reason of stronger transformation of slowly-released K into available K for Fujiandao than 81,394.
机译：两种低地水稻基因型对钾的吸收利用差异在低钾耐性上有所不同，并通过根际耕作法进行了研究。结果表明，对低钾敏感的基因型81,394的根际土壤所有钾组分的枯竭率。 -K胁迫，在充分供应K的情况下比福建岛的严重。在低K胁迫下，福建岛的根际有效钾的枯竭率（＜2mm）为91.3％，在那期间为82.6％。福建道距根表面10mm的土壤中该钾的消耗率仍高达83.0％，而81,394下降至53％。速释钾的消耗量之间无显着差异两种基因型，福建岛根际缓释钾的平均耗竭率（＜3mm）为56.6％，明显高于8,139,441.7％。福建岛根际土壤pH值的下降趋势更为明显。发现比较质子分泌增加到81,394，这可能是由于质子分泌更多地适应低钾胁迫，以及缓慢释放的钾转化为福建省可用钾比81,394更有力的结果。

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