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以苏玉糯5号和渝糯7号为试材,研究不同磷肥施用量和施用时期对糯玉米子粒产量及磷素积累分配的影响。结果表明,糯玉米成熟期子粒产量随施磷量的增加而增加,苏玉糯5号在基施和拔节期分别追施P_2O_575 kg/hm~2处理子粒产量最高;渝糯7号一次性基施P_2O_5150 kg/hm~2的处理子粒产量最高。随着生育进程的推进,两个品种植株磷素积累量均逐渐增加;同一生育时期下,两个品种植株磷素积累量随着施磷量的增加而增加。成熟期苏玉糯5号和渝糯7号两个品种在各施磷处理下子粒中磷素占植株整体的分配比例均最高,达70%左右;雄穗和苞叶中磷素含量相对最低,各仅占植株整体含磷量的2%左右。植株磷素利用效率在基施和拔节期分别追施P2O575 kg/hm~2处理下较低。综合两个品种产量、磷素积累和分配在不同处理的变化趋势,以基施和拔节期分别追施P_2O_575 kg/hm~2较优。
Taking Suyu Nuo No.5 and Yu Nuo No.7 as experimental materials, the effects of different P application rates and application periods on waxy maize yield and phosphorus accumulation and distribution were studied. The results showed that the grain yield of waxy maize increased with the increase of phosphorus application, and the yield of grain was the highest in Suyuhuo 5 at the basal and jointing stages, and the yield of one grain of Yuyou 7 Application P_2O_5150 kg / hm ~ 2 processing grain yield the highest. With the advance of the fertility process, the accumulation of phosphorus in both cultivars increased gradually. Under the same growth period, the accumulation of phosphorus in two cultivars increased with the increasing of phosphorus application. Under the different phosphorus treatments, the proportion of phosphorus to the whole plant in the two cultivars of Suyu Nuo No.5 and Yu Nuo No.7 was the highest, reaching about 70% at mature stage. The content of phosphorus in tassel and husk was the lowest , Each account for only about 2% of the total plant phosphorus content. Phosphorus utilization efficiency of plant was lower under topdressing and jointing stages of P2O575 kg / hm ~ 2. Combining the trend of yield and phosphorus accumulation and distribution of two cultivars under different treatments, topdressing P_2O_575 kg / hm ~ 2 was superior to basal and jointing stages respectively.