9个艾草种源的生长节律与生物量

Growth Rhythm and Biomass of Artemisia argyi from Nine Provenances

【目的】探明不同种源艾草的生长节律和地上部生物量变化规律,为南阳地区艾草品种选择和适时采收提供依据。【方法】采用Logistic方程对WY、HB、XY1、WA1、WA2、WA3、NX、TB及XY2共9个艾草种源的株高和地上部干物质积累量的生长动态进行拟合,采用方差分析方法对地上部干物质积累量进行统计和分析。【结果】9个种源艾草株高和地上部干物质积累量的生长均呈慢-快-慢的S型生长曲线,Logistic方程显示其株高的拟合决定系数为0.972-0.996,地上部干物质积累量的拟合决定系数为0.953-0.998;不同种源艾草总叶数均随生育期延长呈直线增加趋势,但有效叶数无明显增加,无效叶数呈直线上升趋势;9个种源全草干物质量为23030.85-29112.60 kg/hm^(2),艾叶产量为7556.85-9570.75 kg/hm^(2),艾叶产量占全草干物质量的31.72%-33.52%。【结论】艾草株高和地上部干物质积累量可采用Logistic方程进行拟合,模型预测第一茬艾最佳采收期在出苗后65 d左右;9个种源中,NX、XY2和TB的艾叶产量显著高于其他种源。

【Objective】The variation rules in growth rhythm and above-ground biomass of Artemisia argyi from different provenances were explored to provide the basis for variety selection and timely harvest of A.argyi in Nanyang.【Method】The growth dynamics of plant height and above-ground dry matter accumulation of A.argyi from nine provenances(WY,HB,XY1,WA1,WA2,WA3,NX,TB and XY2)were fitted by Logistic equation,and the above-ground dry matter accumulation was analyzed by variance analysis.【Result】The growth of plant height and above-ground dry matter accumulation of A.argyi from nine provenances showed a slow-fast-slow S-shape curve.The Logistic equation showed that the fitting decision coefficients of plant height and above-ground dry matter accumulation were 0.972-0.996 and 0.953-0.998,respectively;The leaf number of A.argyi from different provenances increased linearly with the growth period,but the effective leaf number did not increase significantly,and the ineffective leaf number increased linearly;The dry matter weight of whole plant from nine provenances was 23030.85-29112.60 kg/hm^(2),the yield of A.argyi was 7556.85-9570.75 kg/hm^(2),and the yield of A.argyi accounted for 31.72%-33.52%of dry matter weight of whole plant.【Conclusion】The plant height and dry matter accumulation of A.argyi could be fitted well by Logistic equation,and the model predicted that the best harvest time of the first crop should be completed about 65 days after emergence;The yield of A.argyi from three provenances(NX,XY2,TB)was significantly higher than that from other provenances.