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不同密度，不同品种出叶速度都是初期慢、中期快、后期慢，叶龄指数６５％左右开始，出叶速度最快，一直持续到有效分蘖终止期为止；叶龄指数达到７５％以后，出叶速度明显减慢。在双垅宽行超稀植的大养稀栽培条件下，出叶速度加快，但由于总叶片数的增加，出穗期与普通栽培（３０ｃｍ×１３．２ｃｍ）大致相同；密度、移栽形式、品种与主茎总叶片数之间存在着一定的相关关系；从ｍ２穴数、穴基本苗数两个因素分析，穴基本苗数与主茎总叶片数之间存在着明显的负相关关系，ｍ２穴数与主茎总叶片数之间存在着一定的负相关关系；年度之间每个品种出穗期差异较大，但在同一年度，密植和超稀植的出穗期并无差异，在个别情况下，超稀植栽培比普通栽培出穗期延迟０．５～１天。
The leaves with different densities and varieties were slow in early stage, fast in middle stage and slow in late stage, the leaf age index began to be about 65%, the leaf was the fastest and continued until the effective tillering period was reached. After the leaf age index reached 75% Leaf out of the slow speed. Under the conditions of large and thin cultivation under the condition of double row and wide row of ultra-thin planting, leafing speed was accelerated, but due to the increase of total leaf number, the heading stage was about the same as that of common cultivation (30cm × 13.2cm) There was a certain correlation between the varieties and the total number of leaves of main stems. There were significant negative correlations between the number of basic needles and the number of main stems on the basis of two factors There was a certain negative correlation between the number of holes and the total number of main stem leaves. There was a significant negative correlation between the number of leaves per head and the number of main leaves at the heading stage. However, In some cases, the cultivation of ultra-thinning than the normal cultivation of the heading of a delay of 0.5 to 1 day.