Effects of Nitrogen Concentration on Fine Root Density and Distribution of Juglans regia ‘Xinwen 185’
《北方园艺》[ISSN:1001-0009/CN:23-1247/S]
- Issue:
- 2019年01
- Page:
- 50-55
- Research Field:
- Publishing date:
Info
- Title:
- Effects of Nitrogen Concentration on Fine Root Density and Distribution of Juglans regia ‘Xinwen 185’
- Author(s):
- WANG Shiwei; PAN Cunde; HU Zhenzhu; ZHAO Shanchao; FANG Miao; YANG Li
- (College of Forestry and Horticulture，Xinjiang Agricultural University/Key Laboratory of Forestry Ecology and Industry Technology in Arid Region，Education Department of Xinjiang,Urumqi，Xinjiang 830052)
- Keywords:
- Juglans regia ‘Xinwen 185’; walnut; nitrogen concentration; fine root density; distribution
- PACS:
- -
- DOI:
- 10.11937/bfyy.20181741
- Abstract:
- Juglans regia ‘Xinwen 185’ as one of the main varieties of walnut producing area in the Southern Xinjiang Basin was taken as the test material，and its spatial distribution and length ratio of fine roots (diameter less than 2 mm) under different nitrogen supply levels were studied by setting different nitrogen treatments and using the root drilling sampling method and the image scanning analysis method.The results showed that in the vertical direction，the root length density of fine roots presented a trend of increasing first and then decreasing with the increase of soil depth，and 0-70 cm deep soil layer was the fine root concentrated distribution area.In the horizontal direction，range within 150 cm from the trunk of a tree was the concentrated distribution area of the fine roots，and the length density of fine roots decreased with the increase of the distance from a tree trunk；the fine roots length density of walnut treated with nitrogen was significantly higher than that of the control，and fine root length density and the proportion of fine root length to the total root length increased first and then decreased with the increase of nitrogen application，the expression was medium nitrogen treatment (the amount of nitrogen applied per plant was 1.2 kg) > high nitrogen treatment (the amount of nitrogen applied per plant was 1.8 kg) > low nitrogen treatment (the amount of nitrogen applied per plant was 0.6 kg) and control (the amount of nitrogen applied per plant was 0 kg).In the cultivation of Juglans regia ‘Xinwen 185’，water and fertilizer management should be strengthen in the 0-70 cm depth soil layer within 150 cm of the tree trunk，and proper nitrogen application could promote the formation of fine roots，but deficit and excess of nitrogen were not conducive to the growth of fine roots.
Last Update: 2019-02-12