关键词: 双季稻区, 双季稻区, 品种类型, 早稻, 产量, 钾

Abstract: The quality change of low anvil close planting Fuji fruit under different water nitrogen combinations are studied to explore the best ratio and provide a research basis for the integrated water and fertilizer management. Low anvil close planting Fuji apple grafted by interstocks SH6 was used to comparatively analyze the fruit quality traits, such as appearance quality (single fruit weight, fruit shape index), internal quality (skin hardness, fruit brittleness, pulp hardness and pulp fineness) and flavour index (acidity, soluble solids content) with fruit quality under field common management. The results showed that the quality change under different water nitrogen combinations had certain differences. The fruit quality under high water + high fertilizer, high water + low fertilizer and low water + high fertilizer decreased, through principal component analysis, quality influencing factors of W2N2, W3N2, W2N1 ranked the top three. When 60% field water capacity was made as irrigation limitation, and 50% nitrogen (W2N2) was reduced, Fuji fruit had the highest quality and high shape, peel with moderate hardness, dense and crisp pulp, and delicious flavor, and the excellent fruit rate is relatively high. So, for low anvil close planting of Fuji apple in arid and semi-arid region, the best water and nitrogen combination is 60% field water capacity as irrigation limitation with medium nitrogen level, which could improve the comprehensive quality of fruit.