【摘要】 玉米产量与吐丝期至成热期干物质积累量和这一阶段群体库源特征密切相关。紧凑型玉米比平展型玉米，吐丝至成熟期的于物质积累量高３０８７．６－４５２５．５ｋｇ／ｈｍ￣２，群体库容量大（１３２２．６－１５１６．８ｇ／ｍ￣２），源供应能力强（１０７３．０－１１６８．８ｇ／ｍ￣２），库源比值适宜（１．４５左右），因而籽粒产量相戍提高了２２１４．０－２７１６．５ｋｇ／ｈｍ￣２。玉米品种改良的关键是提高吐丝后群体物质生产效率和光合生产效率，同时使群体库源关系协调发展，相对平衡.更多还原

【Abstract】 This paper study on the dry matter productivity,the relationships of population sink-source and the rule of vield formation of different plant type maize under different densities in the field. The result showed that the yield of n1aize was related to the dry matter accumulation from silkingto maturing stages,and the population sink-source feature in this perid,The compact typemaize,compare with the flat type maize,because of the higher dry matter accumulation from silk-ing to maturing stages (higher 3087.6-4525. 5 kg/hm￣2),the greater population sink capacity(1322.6-1516.8 g/m￣2),the stronger source supply ability(1073.0-1168. 8 g/m￣2),the moreappropriate sink-source ratio(about 1. 45),hence the yield of compact type maize increased by2214-2716. 5 kg/hm￣2.it suggested that the key to improving the breed promoted the popula-tion matter productivity efficiency and photosynthetic efficiency after silking, and also made therelations of population sink-source correspond.更多还原