密度对甘蓝型矮秆油菜干物质及氮素积累分配的影响

doi:10.7668/hbnxb.20192433

摘要/Abstract

摘要： 探讨矮秆油菜干物质与氮素积累分配对种植密度的响应及其与高秆品种的差异，以期为矮秆油菜合理密植提供参考依据。盆栽条件下，选用矮秆油菜MJ01（V1）和高秆油菜川油36（V2），设置2种密度（2，4株/盆）处理，研究密度对矮秆油菜干物质及氮素积累分配的影响及其与高秆油菜的差异。结果显示：加大种植密度，提高了矮秆油菜地上部植株干物质和氮素积累，增加了干物质、氮素在茎秆中的分配比例，降低了干物质、氮素在角果壳和籽粒中的分配比例。与高秆油菜相比，矮秆油菜地上部植株干物质和氮素积累较低，干物质和氮素在籽粒中的分配比例相对较高。矮秆油菜与高秆油菜之间的籽粒产量并无显著差异。增加种植密度，矮秆油菜氮收获指数略有升高，经济系数和氮生理利用效率则呈下降趋势。相同密度下，矮秆油菜的经济系数、氮收获指数和氮生理利用效率均大于高秆油菜，但差异均不显著。与高秆油菜相比，矮秆油菜的地上部植株干物质和氮素积累较低，经济系数、氮收获指数和氮生理利用效率较高，并且在适宜种植密度下矮秆油菜也可获得较高的籽粒产量。

关键词: 甘蓝型矮秆油菜, 干物质, 氮素, 积累分配, 密度

Abstract: To investigate the response of dry matter and nitrogen accumulation and distribution of dwarf rapeseed to planting density and its difference with high-stalk varieties, in order to provide a reference for reasonable dense planting of dwarf rapeseed. Under potted conditions, choose dwarf rapeseed MJ01(V1)and tall rapeseed Chuanyou 36(V2), set up two kinds of density(2, 4 plants/pot)to study the effect of density on the dry matter and nitrogen of dwarf rapeseed. The effect of nutrient accumulation and distribution and its difference with high-stalk rape. The results showed that increasing the planting density increased the dry matter and nitrogen accumulation of dwarf rapeseed above-ground plants, increased the distribution ratio of dry matter and nitrogen in the stalk, and reduced the distribution ratio of dry matter and nitrogen in the silique shell and grain. Compared with high-stalked rape, the dry matter and nitrogen accumulation in above-ground plants of dwarf rapeseed was lower, and the distribution ratio of dry matter and nitrogen in the grain was relatively high. There was no significant difference in grain yield between dwarf rapeseed and high-stalked rape rapeseed. Increasing the planting density, the nitrogen harvest index of dwarf rapeseed increased slightly, and the economic coefficient and nitrogen physiological use efficiency showed a downward trend. Under the same density, the economic coefficient, nitrogen harvest index and nitrogen physiological use efficiency of dwarf rapeseed were higher than those of high-stalk rapeseed, but the difference is not significant. Compared with high-stalk rapeseed, dwarf rapeseed had lower dry matter and nitrogen accumulation in the above-ground plants, and higher economic coefficient, nitrogen harvest index and nitrogen physiological use efficiency. Under the suitable planting density, dwarf rapeseed can also obtain higher grain yield.

Key words: Dwarf rapeseed, Dry matter, Nitrogen, Accumulation and distribution, Density

中图分类号:

S143.1

严红梅, 段秋宇, 李虹桥, 郭世星, 吴永成. 密度对甘蓝型矮秆油菜干物质及氮素积累分配的影响[J]. 华北农学报, 2021, 36(S1): 143-148. doi: 10.7668/hbnxb.20192433.

YAN Hongmei, DUAN Qiuyu, LI Hongqiao, GUO Shixing, WU Yongcheng. Effect of Density on Dry Matter and Nitrogen Accumulation and Distribution of Dwarf Rape[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(S1): 143-148. doi: 10.7668/hbnxb.20192433.

http://www.hbnxb.net/CN/Y2021/V36/IS1/143

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