| 王建,同延安,高义民.关中地区猕猴桃树体周年磷素需量动态规律研究[J].干旱地区农业研究,2008,(6):119~123 |
| 关中地区猕猴桃树体周年磷素需量动态规律研究 |
| Study on dynamics of phosphorus need of kiwifruit tree in Guanzhong of Shaanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2008.06.23 |
| 中文关键词: 猕猴桃 磷素 动态分布 关中地区 |
| 英文关键词:kiwifruit tree phosphorus dynamic distribution Guanzhong of Shaanxi Province |
| 基金项目:国际植物营养研究所(IPNI)资助； 西北农林科技大学创新团队资助 |
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| 中文摘要: |
| 以10年生“秦美”猕猴桃树为试材,研究了猕猴桃树体生物量和各器官及茎和根的皮层、木质部的磷含量和累积动态,以期探讨猕猴桃树磷素吸收、转运和分配规律。结果表明,猕猴桃树整株生物量从萌芽期到果实生长始期增加缓慢,在整个果实生长期快速增加,果实的收获和落叶使整株生物量大幅下降,根系生物量年周期内增加较少。磷在猕猴桃树的根、茎、叶、果及皮层和木质部的分布表现为:根、叶、果实>茎;根和茎的皮层>木质部。萌芽期到果实生长始期猕猴桃叶生长所需的磷素78.89%来自于土壤,4.44%来自根的上年贮藏,16.67%来自茎的上年贮存。果实生长始期到果实迅速膨大末期猕猴桃树吸磷量为全年总吸磷的55.39%,是磷素营养最大效率期。年周期猕猴桃树体吸收磷素的总量为36.95 kg/hm2(猕猴桃产量以40.16 t/hm2计)。进入果实收获期以后和结果前共吸收磷量10.92 kg/hm2,整个果实生长期吸收26.03 kg/hm2,分别占总吸收量的29.55%和70.45%。 |
| 英文摘要: |
| Phosphorus fertilizer is an important factor to the yield and quality of kiwifruit trees.Biomass,phosphorus concentration and accumulation were studied in the cortex and xylem in different parts of field-grown Actinidia Deliciosa cv.Qinmei kiwifruit trees in 2005 and 2006 growing seasons in Guanzhong of Shaanxi Province,China.The objective of this study was to find the dynamic variety of phosphorus uptake,transportation and distribution in different parts of kiwifruit trees.The results showed that the biomass of plant vegetated slowly from coppice shoot sprout period to fruit setting period,and developed quickly from fruit setting period to fruit maturity,and dropped rapidly after fruit harvested and defoliation,and the biomass of roots vegetated slowly in the whole year.Phosphorus content order in the organs were roots,leaves and fruits > stems;cortex > xylem.From coppice shoot sprout period to fruit setting period 78.89% of phosphorus needed by leaves came from soil,4.44% came from root transportation,and 16.67% came from stem transportation.The phosphorus absorption capacity of plant is much more than other periods from fruit setting period to the last days of fruit expansion stage,occupying 55.39% of the total uptake,so this period was the maximum efficiency period of phosphorus absorption.Totally 36.95 kg/hm2 phosphorus was absorbed in a year(the harvest was 40.16 t/hm2),10.92 kg/hm2 phosphorus was absorbed from harvest season to fruit setting period and 26.03 kg/hm2 phosphorus was absorbed in fruit growing period,accounting for 29.55% and 70.45% of total uptake respectively. |
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