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杂交水稻“三两一留”栽培,即两段育秧、两苗寄插、两大(大兜、大行)扯秧留苗的栽培,是一种高产、稳产、低耗的配套栽培新方法,是杂交水稻栽培技术上的新发展。主要表现有成秧率高、节约用种、保险系数大、秧苗素质好、带蘖率高、省工、增产显著等优点,一般每亩比稀播一段育秧(水育秧)增产75公斤以上。在栽培技术上重点掌握以下四点: 1.荫棚育小苗。选择通风向阳,不受烈日暴晒的林荫场地作为第一段育秧苗床。苗床整理要求平、净、硬,厢宽4.5尺。播种时先铺好白铺,再铺上一指尖厚的薄泥,摸平后播种。播量每平方米芽谷7～8两。均匀来回播种,塌埋谷芽,用草木灰
Hybrid rice “three hundred twenty-one stay ” cultivation, that is, two sections of seedlings, two seedlings inserted, two (big pocket, big line) pull seedling cultivation, is a high yield, stable yield, low consumption of supporting cultivation The new method is a new development of hybrid rice cultivation techniques. The main performance has high planting seedling rate, conservation of species, the insurance factor, good quality seedlings, with high tillering rate, labor-saving, yield significant advantages, generally a section of seedling than thinning (watering seedling) yield more than 75 kg. In cultivation techniques to master the following four points: 1. Yin shed shed seedlings. Select the sunny, not exposed to the hot sun-shade venues as the first paragraph nursery seedbed. Seedbed finishing requirements flat, net, hard, car 4.5 feet wide. Shop the first shop when the white shop, and then covered with a thin tip of thick mud, touch and sow. Sowing per square meter Bud Valley 7 ~ 8 two. Sowing back and forth evenly, collapse Guya, with ash