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以豇豆为试材,采用在豇豆生殖生长时期即结荚期摘除部分叶荚的方法,分析了结荚期摘除叶荚后豇豆植株的落花率、成荚率、产量、叶绿素含量以及荧光光谱参数的变化情况。结果表明:初荚期摘叶1/4、摘叶1/3、摘叶1/2植株的落花率均升高,摘荚1/4、摘荚1/3植株的落花率均低于对照。盛荚期摘叶1/4、摘荚1/4、摘荚1/3植株的落花率均低于对照,而摘叶1/3、摘叶1/2的植株落花率高于对照。其中,盛荚期摘叶1/2的豇豆植株落花率最高。在豇豆结荚期摘叶摘荚处理后,植株的成荚率、产量都低于对照。此外,最大光化学效率(Fv/Fm)、光化学反射指数(PRI)与叶绿素含量呈正相关,且R2达到0.80以上。Fv/Fm、PRI、叶绿素含量、落花率与产量的相关性不强,表明还有其它因素对豇豆产量的高低有决定性作用。
Taking cowpea as test material, part of the leaves were excised during the podding stage of the cowpea during reproductive growth stage. The rate of falling, podding rate, yield, chlorophyll content and fluorescence spectral parameters Changes. The results showed that: the first day of pod picking off 1/4, picking off the leaves 1/3, picking off 1/2 plants rose rate, picking pods 1/4, picking pods 1/3 plant flowering rate were lower than the control . The plum blossom season 1/4, picking pod 1/4, pick pod 1/3 plant falling rate were lower than the control, and pick the leaf 1/3, pick leaf 1/2 plant falling rate is higher than the control. Among them, Sheng pod picking 1/2 cowpea plant falling rate is the highest. Pod picking in the cowpea during the pod-picking period, plant pod rate and yield were lower than the control. In addition, the maximum photochemical efficiency (Fv / Fm), photochemical reflectance index (PRI) and chlorophyll content were positively correlated, and R2 reached above 0.80. The correlation between Fv / Fm, PRI, chlorophyll content, and the rate of falling flowers and yield was not strong, indicating that there were other factors that had a decisive effect on the yield of cowpea.