【摘要】 为明确施肥对‘玉露香梨’不同生长发育期N、P和K元素积累的影响效应,以10年生‘玉露香梨’树为研究对象,设置不同氮磷钾肥配比进行试验。结果显示,N、P和K元素含量随梨树生长发育呈下降趋势。氮肥可显著提升‘玉露香梨’萌芽期根部和果实膨大期根部和叶片中N、P和K元素含量,抑制开花期根部N和P元素积累。钾肥可促进其萌芽期和坐果期根部K元素的积累,但萌芽期根部N和P元素、开花期根部K元素的积累被抑制。磷肥抑制其萌芽期根部P和N元素的积累,促进开花期P和N元素及果实膨大期N、P和K元素积累。研究表明,‘玉露香梨’根部和叶片中N、P和K元素的积累受肥料组成和梨树生长周期的影响,施肥中应考虑多因素的交互效应。更多还原

【Abstract】 To clarify the effects of fertilization on the accumulation of N, P and K in ’Yulu Xiang’pear during different growing stages, 10-year-old ’Yulu Xiang’pear tree was selected as the research object, and experimental groups with different fertilizer ratios of N, P and K were set up. The results found that N, P, and K level showed a downward trend with the growth and development of ’Yulu Xiang’pear trees. N fertilizer increased the level of N, P and K in roots in the germination stage and in roots, leaves in the fruit-expanding stage, and inhibited the accumulation of N and P in roots during the flowering stage. K fertilizer could promote the accumulation of K in roots of in the germination and fruit-setting stage, but down-regulated N and P level in roots in the germination stage, K level in roots in the flowering stage. P fertilizer significantly inhibited the accumulation of P and N in roots in the germination stage, and promoted P and N level in the flowering stage,and N, P and K level in the fruit enlargement stage. The present study suggests that the accumulation of N, P and K in the roots and leaves are affected by the fertilizer composition and growth cycle of ’Yulu Xiang’pear,and interaction effect of different factors should be fully considered in fertilization.更多还原