YU Sihai,ZHI Jinhu,TANG Zhihui,et al.Effects of Different N Application Levels on Soil，Leaf Nutrients and Fruit Quality in Pear Orchards[J].Northern Horticulture,2023,(03):15-23.[doi:10.11937/bfyy.20221847]
不同施氮水平对梨园土壤、叶片养分及果实品质的影响
- Title:
- Effects of Different N Application Levels on Soil，Leaf Nutrients and Fruit Quality in Pear Orchards
- Keywords:
- nitrogen application level; nitrate nitrogen; ammonium nitrogen; alkaline nitrogen; leaf total nitrogen; fruit quality
- 文献标志码:
- A
- 摘要:
- 以新疆阿拉尔市九团嫁接5年库尔勒香梨为试验材料，通过随机区组设计，研究不同施氮水平（N1（150 kg?hm-2）、N2（225 kg?hm-2）、N3（300 kg?hm-2）、N4（375 kg?hm-2）、N5（450 kg?hm-2））对库尔勒香梨园生育期内土壤氮素养分、植株叶片全氮含量变化的影响，以期探究梨园适宜施氮量。结果表明：氮肥施用量增加对0~40 cm土层土壤养分含量的影响较为显著，0~40 cm土层各处理硝态氮、铵态氮、碱解氮含量大致呈“增加-降低-增加”趋势；随着氮肥施用量增加，各处理间土壤硝态氮、铵态氮、碱解氮含量变化大致为0~20 cm＞20~40 cm＞40~60 cm。随着氮肥施用量增加，梨树叶片全氮含量呈“增加-降低”趋势，且各处理间全氮含量表现为当年枝条叶片＞多年枝条叶片。石细胞含量、可溶性糖、维生素C含量会随着氮肥的增加呈现先增加后降低趋势。N3、N4处理叶片养分含量较高、果实品质较好。
- Abstract:
- Taking Korla fragrant pear grafted by the Ninth Regiment of Alar City in Xinjiang for five years as experimental materials，the effects of different nitrogen application levels (N1 (150 kg?hm-2)，N2 (225 kg?hm-2)，N3 (300 kg?hm-2)，N4 (375 kg?hm-2)，and N5 (450 kg?hm-2)) on soil nitrogen nutrients and total nitrogen content of plant leaves during the growth period of Korla fragrant pear orchard were studied through randomized block design，in order to explore the appropriate nitrogen application amount in pear orchard.The results showed that the effect of increasing N fertilizer application on soil nutrient content of 0-40 cm soil layer was more significant，and the content of nitrate nitrogen，ammonium nitrogen and alkaline nitrogen in 0-40 cm soil layer showed a general trend of ‘increase-decrease-increase’；with the increase of N fertilizer application，the content of nitrate nitrogen，ammonium nitrogen and alkaline nitrogen in each treatment changed as follows,0-20 cm>20-40 cm>40-60 cm.With the increase of nitrogen fertilizer application，the total nitrogen content of pear leaves showed an ‘increasing-decreasing’ trend，and the total nitrogen content of each treatment showed that the leaves of current year branches>leaves of multi-year branches.The content of stone cells，soluble sugar and vitamin C content showed an increasing trend with the increase of N fertilization，and then decreased.N3 and N4 treatments had higher nutrient content and better fruit quality.
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备注/Memo
第一作者简介：于四海(1997-)，男，硕士研究生，研究方向为植物营养与农业环境。E-mail：ysh652901@163.com.责任作者：支金虎(1978-)，男，博士，教授，现主要从事植物营养与农业环境等研究工作。E-mail：zjhzky@163.com.基金项目：新疆生产建设兵团重大科技计划资助项目（2021AA005）。收稿日期：2022-11-08