Journal of Food, Agriculture and Environment
Spatial and temporal variability of soil nutrients in the black soil area of northeast China
Author(s):
Xiangming Zhu,
Bingjin Han *, Jun ZhaoRecieved Date: 2013-01-22, Accepted Date: 2013-04-28
Abstract:A total of 1400 soil samples from the plow layer (0-20 cm) at an approximate interval of 5 km were collected in the autumn of 2002 over the entire black soil area of Northeast China to determine the spatial and temporal variability of seven variables, such as soil organic matter (Corg), total nitrogen (Ntot), total phosphorus (Ptot), total potassium (Ktot), alkali-dissolvable nitrogen (NPage), available phosphorus (POlsen), and available potassium (KStandford), with classical statistics and geostatistical analysis. From 1979 to 2002, the content of Corg in black soil had dropped 1.75-2.40 g/kg, about 0.08-0.10 g/kg each year. In contrary, POlsen content had increased more than 2 times than that in 1979, from 12.66 mg/kg to 14.66 mg/kg during the last 23 years, about 0.55-0.64 mg/kg annually. Therefore, POlsen was recognized as the most affected soil nutrient property by human activities during the past 23 years. Most soil nutrients (except POlsen) had moderate spatial variability, and were correlated with geographic latitude. Especially, Corg, Ntot and NPage were highly and significantly correlated with latitude, which indicated that these soil nutrient properties were easily affected by natural factors such as climate, temperature and so on.
Keywords:Mollisol,
geostatistics, spatial distribution, soil organic matterJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Environment
Pages: 1386-1389
Full text for Subscribers
Information:
Note to users
The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.
Article purchasing
If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.
Purchase this Article: 20 Purchase PDF Order Reprints for 15
Share this article :