位于接穗和基砧之间的一段砧木。用于二重或多重嫁接，其成苗称中间砧果苗。果苗由品种接穗、中间砧、基砧3部分组成。
The total sugar contents in fruits and leaves of Red Fuji apple on different interstocks showed similar changing trends. The contents all increased devadually during most of the fruit deelopment periods.
4．不同矮化中间砧红富士苹果果实和叶片总糖含量变化趋势大致相似，果实生长发育的大部分时期内均逐渐上升。
参考来源 - 矮化中间砧影响红富士苹果果实大小机理的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
同一矿质元素在不同种矮化中间砧嫁接树中的表现也不尽相同。
The variation of the same kind of elements in different kind of the above trees were also different.
研究了M26中间砧地上部砧段长度对红富士苹果生长发育的影响。
The effects of the aerial part length of dwarfing intermediate stock M26 on the growth and development of Red Fuji apple were studied.
矮化中间砧树叶片、果实和发育枝内多数营养元素含量高于乔砧树。
The contents of the most nutrient elements in the leaves, fruits and extensive shoots of the dwarfing interstem apple trees were higher than those in the vigorous rootstock apple trees.
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