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本文着重讨论了现行推广和旱育苗、简塑盘育苗、盘育苗和纸钵盘育苗等４种不同育苗方法，在超稀植条件下的发育规律。从１９９２年至１９９４年，三年研究结果初步探明：早育苗个体秧苗素质强壮，有利于提高第一节位分蘖和增加一穗粒数，但拔秧移栽过程中伤根多不利于保证第二、三节位的分蘖，盘育苗播种量大秧苗素质弱，插秧过程中又有一定的伤根现象，不利于提高低节位的分蘖；简塑盘育苗虽然移栽时无伤根现象，但秧盘是用塑料制成，育苗过程中保水性能极差，吸收水份和养份不稳定，秧苗素质降低，不利于提高第一至三节位的分蘖；纸钵盘是用纸浆制成的育苗盘，因此即能保水、隔凉、隔热使营养和水份吸收平稳，又能在移栽过程中不伤根，非常有利于促进缓苗，但分蘖生长过份旺盛容易造成高次分蘖增加，不利于提高成熟度。
This paper focuses on the current promotion and drought nursery, simple plastic plate nursery, plate nursery and Bowl plate nursery, and other four different nursery methods, under the conditions of ultra-rare earth development. From 1992 to 1994, the results of three years showed that the seedlings of early nursery seedling were of strong quality, which was beneficial to increase the tillering of the first node and increase the number of grains per spike. However, Two or three knots tiller, plate seedling planting seedling quality is weak, there is a certain wound root phenomenon in the process of transplanting, is not conducive to raising the low node tillering; Seedling tray is made of plastic, very poor water retention performance during seedling, water absorption and instability of nutrients, reduce the quality of seedlings, is not conducive to raising the first three nodes tiller; Bowl plate is made of pulp seedlings Plate, so that can keep water, cool, heat insulation so that nutrition and moisture absorption is stable, but also in the transplanting process does not hurt the root, is very conducive to promoting the Huanmiao, but excessive tiller growth easily lead to higher tillering , Is not conducive to improving maturity.