Kajian Waktu Aplikasi Paclobutrazol dan Beberapa Varietas terhadap Pertumbuhan dan Produksi Tanaman Mentimun (Cucumis sativus)

Abstract

The decline in cucumber production every year is caused by less intensive and efficient cultivation, so technology is needed that can increase yields such as the application of growth regulators (ZPT) and the use of superior varieties. This study aims to determine the application time of paclobutrazol and superior varieties on the growth and production of cucumber plants. This research was conducted at Jalan Galang, Pagar Merbau III Village, Lubuk Pakam District, Deli Serdang Regency and Biotechnology Laboratory, Faculty of Agriculture, University of North Sumatra from August 2024 to October 2024, using a group randomized design with 2 factors. The first factor was paclobutrazol application time consisting of 7 DAT, 14 DAT, 21 DAT, 28 DAT, and the second factor was the use of varieties consisting of Monas F1, Komandan F1, and Zatavy F1. The results showed that different application times of paclobutrazol and varieties caused significant differences in growth and production. The treatment without paclobutrazol application (W0) can increase the growth of plant height and number of leaves of cucumber plants. The treatment of paclobutrazol application at 21 DAT (W3) showed an increase in production parameters, namely the number of fruits, fruit length, fruit diameter, and fruit weight. The Zatavy F1 variety gave the best results in plant height, number of leaves, and fruit weight, while the Monas F1 variety showed a faster age of female flower emergence and harvest age as well as higher fruit size (number of fruits, fruit length, and fruit diameter). The interaction between paclobutrazol application time and the use of several varieties gave a significant effect on leaf area, chlorophyll b and total. Paclobutrazol application time 28 DAT (W4) and the Komandan F1 variety gave higher leaf area results, while the treatment combination of application time 21 DAT (W3) had higher chlorophyll b and total chlorophyll b.