【摘要】 以长粒品种‘龙粳1525’和圆粒品种‘龙粳31’为试验材料,采用完全随机试验设计,研究不同灌溉方式、施氮量及株距对水稻茎蘖利用情况及产量的影响。结果表明:‘龙粳1525’在控灌处理、施氮量116.13 kg∕hm2和14 cm株距下的产量最高,为8 558.58 kg∕hm2;而‘龙粳31’在控灌处理、施氮量134.52 kg∕hm2和12 cm株距下的产量最高,为9 357.61 kg∕hm2,‘龙粳1525’和‘龙粳31’控灌处理下有效分蘖率最高,12 cm株距下的最高茎数、最高分蘖数和分蘖穗数最大,施氮量161 kg∕hm2处理下的最高茎数、最高分蘖数、分蘖穗数和分蘖穗比例最大。结合优化方程得出,长粒品种‘龙粳1525’的最优处理为控灌方式、施氮量116.13 kg∕hm2和株距14 cm;圆粒品种‘龙粳31’的最优处理为控灌方式、施氮量134.52 kg∕hm2和株距12 cm。更多还原

【Abstract】 The long-grain variety ’ Longjing 1525’ and round-grain variety ’ Longjing 31 ’ were used as experimental materials,the completely randomized experimental design was used to study the effects of different irrigation methods,nitrogen application rates and plant spacing on the utilization of rice stems and tillers and yield. The results showed that ’ Longjing 1525 ’ had the highest yield under controlled irrigation treatment,116. 13 kg∕hm2nitrogen application rate and 14 cm plant spacing,which was 8 558. 58 kg∕hm2;while’Longjing31’had the highest yield under controlled irrigation treatment,134. 52 kg∕hm2nitrogen application rate and12 cm plant spacing and the maximum yield was 9 357. 61 kg∕hm2. ’Longjing 1525’and’Longjing 31’had the highest effective tillering rate under controlled irrigation treatments,and the highest number of stems,highest tillers,and tillering panicles under 12 cm plant spacing,and the highest number of stems,highest tillers,tillering panicles and the proportion of tillering ears under 161 kg∕hm2nitrogen application rate. According to the optimization equation,the optimal treatment of the long-grain variety’Longjing 1525’ was controlled irrigation,116. 13 kg∕hm2nitrogen application rate and the 14 cm plant spacing,the optimal treatment of the round-grain variety’ Longjing 31 ’ was controlled irrigation, 134. 52 kg∕hm2nitrogen application rate and 12 cm plant spacing.更多还原