CAJ | 학술논문

为准确模拟油用亚麻叶面积指数，构建油用亚麻生长模型，本文研究环境效应和作物遗传特性对叶面积指数的作用，分别利用2012-2013年定西试验区不同密度、2012-2013年榆中试验区不同施氮、磷量试验测量数据构建模型，采用潜在叶片数、叶片尺寸和种植密度构建潜在叶面积指数；研究同化作用、水分和氮素胁迫的限制构建实际叶面积指数；研究熟化、光竞争、水分胁迫等引起的衰老叶面积指数，从而构建基于 APSIM（农业生产系统模型）的油用亚麻叶面积指数模型。利用2014年定西和榆中的实际测量数据对模型进行校正。模型检验结果表明，该模型能够较准确地模拟油用亚麻叶面积指数，RMSE 最小值0.043，最大值0.672，决定系数 R2取值范围0.56～0.98，模型拟合效果良好。同时，研究结果表明，定西试验站合理密植7.5×106粒·hm -2，可获最大叶面积指数（盛花期）3.92，榆中试验区最佳施氮量75kg·hm -2、施磷（P2 O5）量75kg·hm -2在盛花期获得最大叶面积指数4.486。
위준학모의유용아마협면적지수，구건유용아마생장모형，본문연구배경효응화작물유전특성대협면적지수적작용，분별이용2012-2013년정서시험구불동밀도、2012-2013년유중시험구불동시담、린량시험측량수거구건모형，채용잠재협편수、협편척촌화충식밀도구건잠재협면적지수；연구동화작용、수분화담소협박적한제구건실제협면적지수；연구숙화、광경쟁、수분협박등인기적쇠로협면적지수，종이구건기우 APSIM（농업생산계통모형）적유용아마협면적지수모형。이용2014년정서화유중적실제측량수거대모형진행교정。모형검험결과표명，해모형능구교준학지모의유용아마협면적지수，RMSE 최소치0.043，최대치0.672，결정계수 R2취치범위0.56～0.98，모형의합효과량호。동시，연구결과표명，정서시험참합리밀식7.5×106립·hm -2，가획최대협면적지수（성화기）3.92，유중시험구최가시담량75kg·hm -2、시린（P2 O5）량75kg·hm -2재성화기획득최대협면적지수4.486。
Leaf area index(LAI)model of oilseed flax was constructed by data collected under different den-sities in Dingxi experiment site and with different nitrogen and phosphorus contents in Yuzhong in 2012 - 2013. En-vironment effect and genetic characteristics of flax were considered for accurate LAI model of oilseed flax. Potential LAI was conducted using potential leaves number,leaf size,plant density and water stress factor for leaf expansion. Actual LAI was conducted under water restriction and nitrogen assimilation. Senescence LAI was calculated by u-sing maximum ageing,light competition and water stress. These 3 LAI models were constructed based on APSIM (Agricultural Production System Simulator)model. Models were validated by data from Dingxi station and Yuzhong site in 2014. Validation results showed that the minimum value of RMSE was 0. 043,the maximum value RMSE was 0. 672,and the coefficient of determination R2 was between 0. 56 and 0. 98,which indicated that these models could accurately simulate LAI of oilseed flax. Results also showed that the rational planting density was 7. 5 × 105 plant per hectare in Dingxi with the optimum LAI of 3. 92,the optimum 75kg·hm - 2 N and 75kg·hm - 2 P2 O5 in Yuzhong with the optimum LAI of 4. 486(during flowering stage).