植物激素与营养元素配合施用对苹果座果率的影响

1987～1988年用几种植物激素与营养元素配套喷施,对提高元帅苹果座果率的影响进行了试验。结果表明激素混合物比单一施用效果显著,处理A(GA30ppm+BA50ppm+EF150ppm),B(BA20ppm+EF150ppm)和C(EF200ppm十尿素O.4％+硼砂0.4％)能使元帅苹果在自然座果率8％的基础上达到翻番,满足了盛果树生产负载要求。试验还表明在花期逆境下激素混合物对提高座果的效应更大。为此,建议花期降温或受冻频繁的地区,激素混合物可作为生产常规措施应用。

The Effect of Several Plant Hormones withNutrient Elements on the Fruit Set Rate of Apple

In 1987--1988, experiments of spraying several plant hormones mixed with nutrient elements were carried out to increase fruit set rate of "Delicious" apple. The results showed that the effects of hormone mixtures were better than those of the hormones used alone.Treatments A(30 ppm gibberellin+50 ppm Benzyl adenine+150 ppm EF),B(20 ppm Benzyl adenine+0.4% urea) and C (200 ppm EF+0.4% urea+0.4% borax) were doubled the fruit set rate of "Delicious" compared to its natural level of 8%, which met the needs of production crop load for mature apple trees. The hormone mixtures also had better effect on increasing fruit set percent, under unfavourable conditions during blossoming period. Therefore, the authors suggest that the hormone mixtures be applied as a routine practise in areas where the temperature decreasing or freezing happens frequently