【摘要】 以辽杂15号为参试品种,在13.5万株/hm2的密度下于高粱12片叶时分别喷施1 200倍液乙烯利、400倍液PBO、1 500倍液矮壮素、1 000倍液多效唑4种植物生长调节剂,以喷施清水为对照,于开花后测量株高和茎粗,秋季测产。结果表明,喷施4种植物生长调节剂处理的株高和茎粗与喷施清水处理的相比,均有不同程度的变化,其中喷施矮壮素和乙烯利处理的株高显著低于清水处理;喷施乙烯利处理的茎粗显著高于喷施清水处理;4种处理的产量均有不同程度的提高。更多还原

【Abstract】 Liaoza No. 15 was chosen as tested varieties, and its planting density was 135 000 plants/hm2. With spraying water as check, the 1 200 times solution of ethephon, 400 times solution of PBO, 1 500 times solution of chlormequat chloride and 1 000 times solution of paclobutrazol were sprayed at the period of sorghum 12 leaves. The plant height and stem diameter of sorghum were measured after flowering, and the yield was measured in autumn. The results showed that 4 plant growth regulators had different effects on plant height and stem diameter of sorghum. The plant height was lower treated by ethephon and chlormequat chloride than that by water, and the stem diameter was higher treated by ethephon than that by water. The yield of sorghum treated by 4 plant growth regulators was improved in different extent.更多还原