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(一)矮化剂的使用。多效唑是一种植物生长调节剂,具有促苗矮化、提高秧质、增蘖增穗矮化抗倒、抑制条草等作用。用药时间一般掌握在:秧龄30天,一叶一心期使用;秧龄35—40天,二叶一心期使用;秧龄40—50天的两段育秧,三叶一心期使用。每亩用15%的多效唑可湿性粉剂170～200克,兑水50公斤喷雾,也可每亩用干细土20公斤分次拌匀后撤施。用药前,先排干秧田水,再均匀喷撒药,隔日灌水。
(A) dwarfing agent. Paclobutrazol is a plant growth regulator with the role of promoting seedling dwarf, raising seedlings, increasing tillering, increasing dwarfing and lodging, and restraining the weeds. Medication time generally in: 30 days of seedling age, a leaf a heart period use; seedling age 35-40 days, two leaves one heart period; seedling age 40-50 days two sections of seedling, clover heart phase use. 15% per acre with paclobutrazol WP 170 ~ 200 grams, watered 50 kg spray, but also per mu with dry fine soil 20 kg sub-mix withdrawal after withdrawal. Medication before draining seedling water, and then evenly spray medicine, the next day irrigation.