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作 者 ：陈恺林 刘洋 张玉烛 方宝华 黄泽辉 刘功朋 李超

期 刊 ：植物营养与肥料学报 2013年 19卷 6期 页码：1287-1296

关键词：覆膜；水分；钙；蒸腾速率；相关性；

Keywords:mulching, water, SiO2, transpiration rate, correlation,

摘 要 ：本研究以超级杂交稻P88s/1128为材料，研究了覆膜栽培下不同水分管理方式对超级杂交稻产量及钙（Ca）、 硅（SiO₂）吸收特性的影响，并探讨了硅、 钙吸收总量与蒸腾速率之间的相关性。结果表明，覆膜栽培条件下旱作水稻产量比无膜栽培提高了3.64%；覆膜栽培下湿润处理后穗部钙吸收量为1.58kg/hm²，显著高于灌水处理；栽培模式和水分管理2种处理因子均对水稻后期钙、 硅的积累量具有一定的影响且存在显著的交互作用；覆膜旱植栽培下超级稻后期蒸腾速率与穗部硅的吸收呈显著正相关（r=0.8561*，P=0.0066）。覆膜和后期灌水提高了群体蒸腾速率，有利于营养物质的吸收，同时促进了茎叶中储存的碳水化合物向穗部转运，另一方面，蜡熟期过高的蒸腾速率会导致茎秆中碳水化合物过量输出，可能带来倒伏风险。

Abstract:Absorption characteristics of Ca and SiO₂ and transpiration rate under mulching cultivation of upland rice were studied by using P88s/1128 as material and with different water managements as treatment. The result shows that the mulching has a significant effect on yield but not on yield component. The absorption amount of calcium in panicle is 1.58 kg/ha under the mulching and moist treatment which is significantly higher than that of the irrigation treatment. The cultivation mode and water management have some influence on the accumulation of SiO₂ and Ca at the late stage,  and the interaction of these two processing factors is significant. The corrrelation between the SiO₂ quantity of panicle absorbed and transpiration rate is significant(r=0.8561*,  P=0.0066). Mulching and irrigation at the later stages has promoting effects for transpiration rate which is beneficial for absorbing nutrition and carbohydrate translation from stem to panicle. But it would easy to lodging if the transpiration rate so high that carbohydrate in the stems exports excessively.

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