纳罗克非洲狗尾草种子产量构成因子分析

为了解纳罗克非洲狗尾草单株种子产量构成因子,探索提高种子产量的解决途径,试验选择7个纳罗克非洲狗尾草单株种子产量构成因子;另取4个单株穗子10等分,从基部依次编为1-10号,试验中脱落的种子为11号。单株种子产量构成因子相关性分析结果表明,纳罗克非洲狗尾草单株种子产量(W)与生殖枝数(X₃)呈极显著正相关(P<0.01),与分蘖数(X₂)呈显著正相关(P<0.05);多元逐步回归单株种子产量W=-16.59156+0.42479X₃-0.03082X₅+0.04923X₆。对穗子不同部位的种子分析结果表明,试验中脱落的种子11号质量最好,其次为7号种子。不同部位的种子产量以1、3、8号种子产量较高,而9、10号种子产量最低。提示,纳罗克非洲狗尾草穗子中部的种子产量较为稳定,产量也较高,而穗尾1/3部的产量最低,收种时应确定以穗子中部的种子成熟为最佳收种时机。

Analysis on Seed Yield Components of Setaria sphacetata cv.Narok

To understand the seed yield component factors of Setaria sphacetata cv.Narok, and explore solutions for improving the seed yield, 7 strains of Setaria sphacetata cv.Narok were analyzed, and 4 plant grains were selected with dividing into 10. In turn made up of 1 to 10 from the base part shed seeds, and falling seeds of the trial was for No.11. Results showed that seed yield per plant (W) of Setaria sphacetata cv.Narok was significantly positive correlated with reproductive branch number (X₃)(P<0.01),and significantly correlated with tiller number (X₂)(P<0.05). Multiple stepwise regression analysis on the seed yield per plant (W) were carried out, and the equation was W=-16.59156+0.42479X₃-0.03082X₅+0.04923X₆. Seed quality analysis on seeds of different sites showed that falling seeds of the No.11 had the best quality, and the second was No.7, and seed yield of No.1, No.3 and No.8 were higher than others, while No.9 and No.10 were the lowest. Research results found that middle ear showed high and stable production, 1/3 of tail ear was low production. Best harvest time should be selected when seeds in middle ear were fully maturation.