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为选择大豆苗期干旱胁迫条件下适宜的种子处理技术,以南豆12为材料,采用盆栽试验法研究在苗期轻度干旱胁迫(A1)、中度干旱胁迫(A2)和正常供水(A3)3种水分处理下,研究种衣剂包衣(B1)、烯效唑干拌种(B2)、根瘤菌拌种(B3)和种子不处理(B4)4种种子处理方式对大豆农艺性状、产量及品质的影响。结果表明:苗期水分胁迫较正常供水处理大豆的株高降低,第1节间长度缩短,茎粗增加,倒3叶叶面积减小,对产量和品质无显著影响。种子处理较不处理显著提高了大豆的产量和品质,以B2处理的大豆单株籽粒、蛋白质和粗脂肪产量最高,其次为B1。在苗期适度干旱胁迫下烯效唑干拌种显著降低了大豆的株高,缩短第1节间长度,增加茎粗和倒3叶叶面积,提高了大豆产量,改善了大豆品质;在轻度干旱胁迫下,烯效唑干拌种的大豆单株籽粒、蛋白质和粗脂肪产量分别比对照提高34.59%、34.85%和28.70%,在中度干旱胁迫下,则分别提高29.36%、31.93%和24.11%。
In order to choose suitable seed treatment technology under the condition of drought stress in soybean seedling, the pot experiment was conducted to study the effects of mild drought stress (A1), moderate drought stress (A2) and normal water supply (A3) ) Under the three kinds of water treatments, the effects of four seed treatments of coating agent coating (B1), uniconazole dry dressing (B2), rhizobium dressing (B3) and seed non-treatment (B4) , The impact of yield and quality. The results showed that the seedling stage water stress was lower than that of normal water supply treatment. The length of the first internode decreased, the stem diameter increased, and the area of the third leaf reduced, which had no significant effect on the yield and quality. Soybean yield and quality were significantly improved by less treatment of seeds. The yield of grain, protein and crude fat of soybean treated with B2 was the highest, followed by B1. Under the moderate drought stress at seedling stage, the treatment of uniconazole dry dressing significantly reduced the plant height, shorten the length of the first internode, increased the stem diameter and the area of the third leaf, increased the soybean yield and improved the quality of the soybean; Under drought stress, the yield of grain, protein and crude fat of uniconazole-treated soybean seedlings increased by 34.59%, 34.85% and 28.70% respectively compared with the control, but increased by 29.36% and 31.93% under moderate drought stress, respectively. And 24.11%.