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在北方的温室与阳畦番茄生产上应用2,4-D后,有效地起到了防止落花和提高产量的作用。但在露地栽培条件下,2,4-D的大面积使用还较少。据文献记载2,4,5-T促进番茄子房膨大的效果不及2,4-D,但药害轻微;因而系统地了解在露地条件下,2,4,5-T对于番茄的刺激效应,找出其使用的适宜浓度,并选用相应有效的品种类型,这对于促进北方露地大面积早熟番茄生产方面具有一定意义。 1957年以有限生长类型品种(武魁二号)和无限生长类型不同熟期品种(中熟种粉红甜肉和晚熟种世界一)为材料,设 2,4,5-T不同浓度(25、50与 75 p. p. m.)处理和 2,4-D(20 p.p. m.)不处理(喷水)二个对照,小区面积 60平方尺,顺序排列,重复二次,开花期内每隔2-3天喷射一次。1955年仅从无限生长类型二个品种(早熟种红瓦伦特与中晚熟品种格利克斯大粉)为材料进行了类似的处理。研究桔果如下: 一不同处理区果实产量比较
The application of 2,4-D to greenhouses and sun-yang tomatoes in the north has effectively helped to prevent falling flowers and increase yields. However, in open-field cultivation conditions, the use of 2,4-D is still relatively small. According to the literature 2,4,5-T to promote ovarian enlargement of tomato ovary less effective than 2,4-D, but slight damage; and thus a systematic understanding of the open field conditions, 2,4,5-T on tomato stimulation effect , Find out the appropriate concentration for its use, and choose the appropriate type of variety, which is of great significance to promote large-area early-maturing tomato production in the open field in the north. In 1957, two cultivars of limited growth type (Wukui No.2) and inflorescences of different maturity varieties (medium sweet pink and late-maturing world one) 50 and 75 ppm) and 2,4-D (20 ppm) untreated (sprinkled water). The area of the plot was 60 sq. Ft., Arranged in sequence and repeated twice. Spray once every 2-3 days during flowering . In 1955, only two varieties of inflorescence growth type (early-maturing red Valente and middle-late-maturing grix superstar) were treated similarly. The results are as follows: A comparison of fruit yield in different treatment areas