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首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >Annual dry-matter production by three apple cultivars at four within-row spacings in New Zealand
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Annual dry-matter production by three apple cultivars at four within-row spacings in New Zealand

机译：新西兰三个行列间距的四个苹果品种的年度干物质生产

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Annual dry-matter production was estimated in 1993 from eight-year-old apple trees of 'Fuji', 'Braeburn' and 'Royal Gala' on rootstock M.9, trained as slender spindles, in a spacing trial with trees spaced at 1.3, 1.5, 1.9 and 2.4 m within the row with tree rows 3.5 m apart. Light interception was recorded at intervals during the season. Both fresh weight yield and total dry-matter production were linear functions of light interception, with a higher slope recorded for the two late season cultivarscompared with the early maturing 'Royal Gala'. Comparison of the relationship between mid-season light interception and apple yields with published values from elsewhere, reveals that the slope of the relationship is enhanced under New Zealand conditions. The relationship suggests an upper limit of yield of 169 t ha-1 at 90% light interception, slightly higher than the maximum yield recorded of 163 t ha-1. Energy conversion of intercepted light over the growing season into dry-matter production was similar to that observed in the United Kingdom, suggesting that the major climatic advantage in New Zealand over the United Kingdom is the higher growing season radiation integral. Dry matter was allocated in the order fruit > woody tissue > leaves, with partitioning to the fruit of 74, 72 and 63% for 'Braeburn', 'Fuji' and 'Royal Gala', respectively. Under New Zealand conditions, sustainable 70% harvest index values may be achievable for mature apple trees on dwarfing rootstock with late maturing cultivars.
机译：在1993年的间隔试验中，用细长的纺锤体训练M.9砧木M.9上八年的苹果树“ Fuji”，“ Braeburn”和“ Royal Gala”，估算出干物质的年产量。 ，行内1.5，1.9和2.4 m，相距3.5 m的树行。在该季节中间隔记录光拦截。鲜重产量和干物质总产量均是光截留的线性函数，与早熟的“皇家晚会”相比，两个晚季品种的斜率更高。将季节中的光线拦截和苹果产量之间的关系与其他地方的公布值进行比较，发现该关系的斜率在新西兰条件下得到了增强。这种关系表明，在90％的光线拦截下，产量上限为169 t ha-1，略高于记录的最大产量163 t ha-1。在生长季节，截获的光能转换为干物质生产的能量转换与在英国观察到的相似，这表明新西兰相对于英国，主要的气候优势是较高的生长季节辐射积分。干物质按果实>木本组织>叶片的顺序分配，其中'Braeburn'，'Fuji'和'Royal Gala'分别占74％，72％和63％。在新西兰的条件下，对于矮化砧木和晚熟品种的成熟苹果树，可以达到可持续的70％收获指数值。

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