NGHIÊN CỨU ẢNH HƯỞNG CỦA KHOẢNG CÁCH TRỒNG VÀ LƯỢNG BÓN PHÂN KALI ĐẾN NĂNG SUẤT, CHẤT LƯỢNG HẠT GIỐNG HY THIÊM (SIEGESBECKIA ORIENTALIS L. ) TẠI TỈNH THANH HÓA

Abstract

The study focuses on the effect of planting distance and amount of potassium fertilizer on yield and seed quality of Herba siegesbeckiae. The experiment was designed in split-plot with 9 treatments and 3 replicates, of which the planting distance factor is the large plot and the fertilizer factor is the small plot with the corresponding symbols: K1: Plant distance 40 cm x 40 cm, K2: Plant distance 40 cm x 50 cm, K3: Plant distance 40 cm x 60 cm, P1: Applying 30 kg K₂O /ha, P2: Applying 40 kg K₂O/ha, P3: Applying 50 kg K₂O /ha. The research results showed that the growth, development and seed yield indicators, the germination rate of hydrangea seeds tended to increase. The interaction between the planting distance of 40 cm x 50 cm and the amount of potassium fertilizer 50 kg K₂O/ha gave the best growth and development parameters, the actual yield ranged from 1.53 to 1.78 quintals/ha, and the germination rate of seeds reached 85%, higher than other formulas at the significant probability level with LSD_0.05.