摘要
为避免因抽薹而降低萝卜的食用性与商品性,有必要做好抽薹期预测.根据萝卜发育对低温春化的反应特点,2009-2013年在鄂西南高山地区海拔400、800、1200、1600、1800m高度对‘短叶13’、‘雪单一号’2个萝卜品种进行了不同海拔、播期的田间试验及小气候对比观测;引入温度热效应、低温春化效应、光周期敏感性的作物发育速率影响函数,建立了萝卜抽薹生育期的数学模拟模型,并对所建模型进行了校正和检验.结果表明:播种至抽薹生育期所需天数的模拟值与实测值之间平均绝对误差(mean absolute error,MAE)‘短叶13’与‘雪单一号’分别为2.4、2.7天,平均相对误差(mean absolutepercentage error,MAPE)分别为6.87％、3.26％;与有效积温法(MAE分别16.9、16.0天)和PAR日积分法(MAE分别14.7、13.4天)发育期模型相比,2个品种的精度分别提高28％、14.6％以上;模型可以用于高山萝卜错季抽薹期实际预测.
Abstract
In order to avoid the reduction of radish edibility and commodification caused by bolting,it's necessary to forecast the bolting period of radish.According to vernalization effect of radish,field experiments and micro-climate observations at different sowing dates were made from 2009 to 2013 on two radish varieties:‘Duanye 13’ and ‘Xuedan 1 ’,with different altitudes at 400,800,1200,1600 and 1800 m in southwest Hubei highland areas.By the intervention of temperature thermal effects,vernalization effect and photoperiod sensitivity of crop development rate influence function,mathematical simulation models of the radish bolting stage were established and calibrated.The results showed:for the two radish varieties ‘Duanye 13’ and ‘Xuedan 1 ’,the MAE of simulated and measured phenophase days from sowing to bolting were 2.4 and 2.7 d,respectively,and the MAPE were 6.87％ and 3.26％,respectively.Compared with other crop growth model,effective accumulated temperature method and integral PAR method,the accuracy was improved by 28％ and 14.6％.So the established model can be used to modeling the bolting stage of highland radish better.
基金项目
国家现代农业大宗蔬菜产业技术体系(CARS-25)
湖北省自然科学基金重点项目(2009CDA110)
国家科技期刊平台
NSTL
维普
万方数据