种植密度对孜然芹产量构成及干物质分配的影响

研究了孜然芹在4种密度下农艺性状、产量性状、干物质积累及分配等变化规律。结果表明:随着种植密度的增加,株高、复伞形花序数、分枝数、有效分枝数、二、三级分枝数、单株粒数、千粒重及单株产量总体上呈下降趋势,密度对一级分枝数的影响不显著;220万株/hm2时植株个体优势明显,产量最高;在产量组成中一级分枝对单株产量的贡献最大;成熟时干物质主要分配至果实,约占总量的60%,其次为茎枝,根系占的比重较小。

Effect of Density on Yield Composition and Dry Matter Distribution of Cuminum cyminum L.

The variety regulation of the agronomic character, yield character, dry matter accumulation and distribution in four kinds of different density of Cuminum cyminum L. were studied in this experiment. The results show that plant height, No.of compound umbel, branch, effective branch, second growth, third growth, seed number per plant, thousand-grain weight and single plant yield were decreased with the density increasing generally. The relation between No.of first order branch and plant density wasn''t prominent; the yield of 2.2 million plant per hm2 was the highest, and the plant''s individual vigor of 2.2 million plant per hm2 was also obvious; the first order branch did the strongest contributions to yield of single plant; dry matter was mainly translated into fructus in the process of becoming mature, about 60% of total, to next was cauloma and ramus, to last was radix.