杂交水稻是目前提高水稻产量最常用的方法。
杂交水稻应用则是提高水稻产量的最佳选择。[{'character': '杂', 'pinyin': 'za2', 'highest pitch': 9.19, 'lowest pitch': 8.12, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '交', 'pinyin': 'jiao1', 'highest pitch': 11.21, 'lowest pitch': 10.77, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '水', 'pinyin': 'shuei3', 'highest pitch': 10.88, 'lowest pitch': 5.87, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '稻', 'pinyin': 'dao4', 'highest pitch': 9.01, 'lowest pitch': 5.87, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '应', 'pinyin': 'ing4', 'highest pitch': 8.25, 'lowest pitch': 7.24, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 7.57, 'lowest pitch': 5.89, 'duration': 0.23, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '则', 'pinyin': 'ze2', 'highest pitch': 7.06, 'lowest pitch': 6.6, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 7.72, 'lowest pitch': 6.62, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '提', 'pinyin': 'ti2', 'highest pitch': 7.05, 'lowest pitch': 6.92, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '高', 'pinyin': 'gao1', 'highest pitch': 9.09, 'lowest pitch': 6.92, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '水', 'pinyin': 'shuei3', 'highest pitch': 10.88, 'lowest pitch': 5.21, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '稻', 'pinyin': 'dao4', 'highest pitch': 9.01, 'lowest pitch': 8.24, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '产', 'pinyin': 'chan3', 'highest pitch': 8.24, 'lowest pitch': 2.88, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '量', 'pinyin': 'liang4', 'highest pitch': 7.25, 'lowest pitch': 4.18, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.27, 'lowest pitch': 5.63, 'duration': 0.12, 'prosody hierarchy': '#1'}, {'character': '最', 'pinyin': 'zuei4', 'highest pitch': 8.87, 'lowest pitch': 7.75, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '佳', 'pinyin': 'jia1', 'highest pitch': 10.28, 'lowest pitch': 9.26, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '选', 'pinyin': 'xvan3', 'highest pitch': 10.18, 'lowest pitch': 4.65, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '择', 'pinyin': 'ze2', 'highest pitch': 7.06, 'lowest pitch': 4.93, 'duration': 0.32, 'prosody hierarchy': '#4'}]