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大田栽培条件下,在大豆始花期叶面喷施以植物多糖(P1)、植物多糖和5-氨基乙酰丙酸(P2)以及植物多糖、5-氨基乙酰丙酸和缩节胺(P3)为有效成分复配的3种制剂,研究不同植物多糖类复合制剂对大豆叶绿素含量、光合蒸腾特性、干物质积累与分配以及籽粒产量的影响.结果表明:喷施3种制剂35d内,大豆叶片叶绿素含量与对照相比明显增加,且随生育进程下降的趋势有所延缓;喷施P1和P3使大豆叶片光合速率和水分利用效率分别提高13.2%和10.3%以上.与对照相比,喷施3种制剂促进了大豆地上部干物质积累量的增加、提高了叶片干物质向荚的分配比例,花后干物质同化量对籽粒的贡献率增加17.1%以上;喷施P1和P3后,大豆单株荚数、单株粒数和百粒重显著增加,喷施P2后变化不显著;喷施3种制剂使大豆增产5.9%以上.3种植物多糖类复合制剂可促进大豆叶绿素合成、延缓叶片衰老、改善叶片光合潜能和水分状况,有效调控大豆干物质积累和花后同化物分配,进而实现增产.
Under field cultivation, plant polysaccharides (P1), plant polysaccharides and 5-aminolevulinic acid (P2) as well as plant polysaccharides, 5-aminolevulinic acid and pantocylamine (P3) The effects of different plant polysaccharides on the content of chlorophyll, photosynthesis and transpiration, accumulation and distribution of dry matter and grain yield were studied.The results showed that spraying 35% Compared with the control, the content of chlorophyll increased significantly and the trend of decreasing with the growth of the plant was delayed. The spraying of P1 and P3 increased the photosynthetic rate and water use efficiency of soybean by 13.2% and 10.3%, respectively. Compared with the control, The three kinds of preparations promoted the increase of dry matter accumulation in aboveground parts of soybean and increased the proportion of dry matter to pod, and the contribution of dry matter assimilation to grain increased by more than 17.1%. After P1 and P3 were sprayed, The number of pods per plant, the number of grains per plant and the weight of 100 seeds increased significantly, and the changes did not change significantly after spraying P. The three kinds of preparations were sprayed to increase the yield of soybean by more than 5.9% .The three plant polysaccharides could promote the synthesis of chlorophyll, Delay leaf senescence, After the photosynthetic potential and good water status, effective regulation of dry matter accumulation and allocation of assimilates to spend, and thus increase output.