高产早稻密肥效应及群体动态与产量结构模拟模型研究

A Sstudy on the Simulated Model of Density-Fertilizer ,Ponulation Dynamics and Output Sturcture

经对湖南涔澹地区常规早稻密、肥效应模拟模型研究,得出亩产500kg以上的密、肥组合决策为:在每亩翻压红花草籽绿肥2000kg底肥的基础上,植基本苗26.07～27.26万/亩,追纯氮10.32～12.07kg/亩、p_2O_510.5～12.54kg/亩、K_2O13.98～16.47kg/亩。最佳产量结构为:每亩30.94～32.99万穗,每穗61.24～61.76实粒,千粒重26.33～26.41g,结实率84.13％～84.24。通径分析表明,四大产量因素,以力争亩穗数,狠抓穗实数,兼顾千粒重为主攻方向;同时,通过研究找出了高产田的株高、叶龄、亩总蘖数等群体动态结构指标的运行发展轨道,可为田间管理看苗促控提供信息。

Based on the research into thde simulated model of intensity-fertilizer effect fornormal early rice in the region near the lakein Hunan Province,the intented nrocedureincludes :in addition to basal fertilizerof 200kg per mu safflower seed manure,plantingoriginal seedings of 0,26m 0000 plants per mu ,topdressing 10. 32-12. 07kg pure N,10. 5-12. 54kgP2O5 and 13. 98-16. 47kg K2O per mu. The best output structure is :0. 30m 9400 ears per mu ,61. 24-61. 76 grains per ear and 26. 33-26. 41g per kilogram,fruiting rate being 84. 13%-84. 24%. The analysis shows:out of the four output factors ,the ear numberper mu and the grain number per ear is stressedas well as killograin weight. At the sametime,based on the study,the developnment law of the dynamic structural indec includingthe plant height ,Leaf age and total tillernumber per mu in the high yield fields hasbeen found and this can provide the infor-mationfor the management of the rice fields. KEY WORDS early rice,revolving regression,simulated model, population dynamics ,output structure