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以杂交中稻高产品种Ⅱ优7号和高产优质新品种渝香优203为材料,在西南稻区4省(市)的6个生态点采用相同的试验方案,研究了籽粒性状与地理位置、土壤肥力和施氮水平的关系。结果表明,6个籽粒性状(粒长、粒宽、粒厚、千粒重、密度和充实率)在试验地点间及品种间的差异均达极显著水平,部分籽粒性状在施氮量间的差异及地点、品种与施氮量的交互作用达极显著水平。2个品种一致表现在低经度、高纬度生态和较高的土壤全氮、全磷、有效磷、有效钾基础肥力条件下,降低施氮水平,有利于增加粒长和粒宽进而提高千粒重和充实率。但品种间有些籽粒性状对生态条件、土壤肥力及施氮水平的反应存在个性差异,Ⅱ优7号更适宜于高海拔和低氮、高磷、高有机质环境条件下种植,渝香优203更适宜在低氮、高磷钾环境条件下种植。
Using the same high yielding hybrid rice variety Ⅱ You 7 and Yu Xiang You 203 as materials, the same experiment scheme was used in 6 ecological sites of 4 provinces (cities) in the southwest of China. The effects of grain traits and geographical location, Fertility and Nitrogen Application. The results showed that there were significant differences in grain traits (grain length, grain width, grain thickness, 1000-grain weight, density and seed filling rate) between the test sites and among cultivars. The interaction between location, variety and N application rate reached a significant level. The results of two cultivars showed that under the conditions of low longitude, high latitude and high soil total nitrogen, total phosphorus, available phosphorus, and available potassium basal fertility, the two cultivars could reduce the nitrogen level, increase the grain length and grain width, Fulfilling rate. However, there were some differences in the response of some grain traits to ecological conditions, soil fertility and nitrogen application rate. ⅡYou 7 was more suitable for planting under high altitude and low nitrogen, high phosphorus and high organic matter environment conditions. Suitable for low nitrogen, high phosphorus and potassium environment conditions.