水稻不同灌溉方式下的高产生理特性

 以3个高产杂交水稻组合中优6号、两优培九、Ⅱ优7954为材料，研究了水稻好气灌溉条件下的生理特性。与传统淹水灌溉相比较，好气灌溉条件下水稻整个生育期田间水位降低，土壤氧化还原电位提高；分蘖早发，前期分蘖和大分蘖比例提高，分蘖成穗数提高7.1%~18.3%，增产8.6%~10.8%。同时，好气灌溉在单丛叶面积没有显著下降的情况下，提高群体各层次的透光率。与传统方式比较，水稻好气灌溉处理在孕穗期和开花期根系单茎伤流量增加，花后叶片光合速率、气孔导度和比叶重提高。

Physiological Characteristics of High-Yielding Rice under Different Irrigation Methods

A field experiment was conducted to study the physiological characteristics of high-yielding rice under aerobic irrigation. The results showed that the water level in the paddy field under aerobic irrigation was lower than that under the traditional irrigation throughout the whole growing season, resulting in the increases of oxidation-reduction potential and number of early tillers, and the productive panicles and grain yield were increased by 7.1% to 18.3% and 8.6% to 10.8% over the traditional irrigation, respectively. Under aerobic irrigation, the light transmittance of rice canopy was increased while the leaf area per hill was decreased insignificantly, the root exudates at the booting and flowering stages and net photosynthetic rate, stomatal conductance and specific leaf weight of leaf after flowering were increased as compared with those under traditional irrigation.