水稻吸氮量和干物质积累的模拟试验研究

The validation of modeling effects of different nitrogen levels on the leaf nitrogen and yield dynamics of rice

本文描述了土壤氮和肥料氮素对水稻不同时期生长的影响及水稻对氮素吸收和在各组织器官的分布模式 ,借助水稻生长模型ORYZA - 0 ,通过田间和水槽的氮肥试验结果对水稻模型和氮素动态模块进行了验证。结果表明 ,模型模拟的水稻生物量、产量、叶片吸氮量和地上部吸氮量与实测值呈明显的正相关 ,其相关系数分别为 :生物量r=0 9889;产量r =0 992 2 ;叶片吸氮量r =0 95 97;地上部吸氮量r =0 92 34。模拟生物量、产量和实测的生物及产量的相关性较高 ;而对叶片吸氮量、地上部吸氮量的模拟值与实测值的相关性稍低一些。但总体来看 ,该模型不仅能较准确地模拟水稻生长动态 。

This paper described the soil nitrogen and fertilizer nitrogen effects on the rice (Oryza sativa L.) growth in different stages and how about the rice absorbs the nitrogen process and nitrogen distribution in the organs. By means of the rice growth simulation model ORYZA, combined with the field experiments and water tank plots, the model and nitrogen dynamic modules for rice were tested and validated. The modeling results presented a reasonable fitness with the real measured results on the biological yield, economic yield, leaf nitrogen content and total nitrogen of rice. The relationship co\|efficiency between the modeling and measured figures for the biological yield, economic yield, leaf nitrogen and total nitrogen of rice were r=0.9889;r=0.9922;r=0.9597; r=0.9234 respectively. The results indicated that the rice model and nitrogen modules can predicted the actual rice growth and nitrogen accumulation and distribution dynamics in two rice varieties.