矮化、密植、早结、丰产(简称“矮密早丰”),是梨树栽培制度上的一项重大改革,是夺取梨树高产稳产的重要措施。我所自1976年开始此项试验,收到了“三年投产、四年丰产”的效果。1976年定植的1.08亩二宫白,中度密植园(株距行2.5×4米,每亩66.7株),第三、四、五年的,亩产量分别为313.8斤,1,929.9斤,3,353.7斤。 Dwarfing, dense planting, early knot, high yield (referred to as “short and dense morning abundance”), is a major reform of the pear cultivation system, is an important measure to seize high and stable yield pear. Since I started this pilot project in 1976, I have received the effect of “three years of operation and four years of high yield”. The 1.08 mu of Nirvong White and Medium Density Plantation planted in 1976 (2.5 × 4 m from Yarlung Bay and 66.7 plants per acre) were planted in the third, fourth and fifth years. The output of mu was 313.8 kg, 1,929.9 kg and 3,353.7 kg respectively.