多效唑对春花生的生物和产量效应
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摘要
本试验以不同浓度的多效唑,分别对花生种子进行浸种处理和盛花期进行叶面喷施,定期观测其主要农艺性状、生理生化指标、生长状况及产量。试验结果表明:
     1 多效唑浸种可延缓花生种子萌发,发芽率有所下降,植株矮化。
     2 盛花期喷施适宜浓度的多效唑,能优化花生植株的生理生化特性,表现为显著提高了花生叶片的蛋白质含量和叶绿素含量,增强了花生叶片的光合速率和蒸腾速率,增强了主根活力,降低了花生叶片的丙二醛含量。
     3 盛花期喷施适宜浓度的多效唑,能抑制花生地上部分的生长,使主茎和分枝长比对照短,但分枝数较多。喷施3周后,单位叶面积鲜重、干重以及植株鲜重、干重均比对照的高。
     4 成熟收获时,喷施多效唑的植株其单株结荚数、饱果率和产量均比对照的高。其中,以喷施150mg.L~(-1)多效唑的处理产量最高,达3806.25 Kg.(hm~2)~(-1),比对照增产12.57%。
Peanut seeds were soaked with different concentrations of paclobutrazol for 24 hours before germination and different concentrations of pacJobutrazoJ were sprayed on leaves of peanut at fully flowering stage in the experiment. The major agronomical characteristics were investigated, and some physiological and biochemical characteristics in the leaves of peanut were determined at different stages, and plant growth and yield of peanut were investigated. The main results were as follows:
    1. Soaking the seeds with different concentrations of paclobutrazol delayed the germination of the seeds, resulted in lower germinating rate and shorter plan height of peanut.
    2. The treatments with suitable concentration of paclobutrazol sprayed on leaves of peanut at fully flowering stage optimized some physiological and biochemical characteristics in the leaves . It was showed that the paclobutrazol treatments increased obviously the contents of protein and chlorophyll in the leaves, and improved the rates of photosynthesis and transpiration of the leaves, and increased the activity of the roots, but decreased the content of MAD in the leaves.
    3. The treatments with suitable concentration of paclobutrazol sprayed on leaves of peanut at full flowering stage restrained growth of the above-ground parts of the plants, resulting in shorter stems and branchs height were shorter, but more branches. Three weeks after spraying paclobutrazol, the fresh weight and dry weight per unit of leaf area and per plant increased.
    4. At harvest, the quantity of pods, the percentage of plumy pods and the peanut yield were higher in the paclobutrazol treatments than that in the control. The highest peanut yield was found in the treatment sprayed with 150 tag. I-1 paclobutrazol, which reached 3806.25 Kg. (hm3) ', and increased by 12.57% as compared with the control.
引文
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