Effects of kiwifruit trees planting and wheat-maize rotation planting on the status of soil nutrients
In order to investigate the differences in soil nutrients status under different land use patterns as well as the problems in fertilization and management,we employed joint methods of Geo -statistical analysis and GIS to study the content and spatial correlation of soil nutrients under two land use types of kiwifruit orchard and wheat -maize rota-tion farmland in Zhouzhi County,Shaanxi Province.The characteristics of spatial variability and distribution patterns of soil nutrients were also analyzed.The results showed that the content of organic matter,alkali -hydrolyzable nitrogen, available phosphorus and readily available potassium in kiwifruit orchards were(19.55 ± 3.13)g·kg-1,(80.58 ± 14.69)mg·kg-1,(23.37 ± 6.09)mg·kg-1,(102.79 ± 12.74)mg·kg-1respectively,pH value was 7.32 ± 0.49.The content of four nutrients in wheat -maize rotation farmland were(19.43 ± 2.63)g·kg-1,(78.80 ± 11.39)mg· kg-1,(24.83 ± 6.06)mg·kg-1,(95.03 ± 11.75)mg·kg-1respectively,pH value was 7.41 ± 0.58.The mean con-tent of organic matter,alkali-hydrolyzable nitrogen,readily available potassium of kiwifruit orchards were higher than that of wheat-maize rotation farmland,only the content of available phosphorus was lower.The variation coefficient of all soil nutrients belonged to moderate spatial variability and they were between 10% and 100%.In kiwifruit orchards, organic matter,alkali-hydrolyzable nitrogen,available phosphorus,readily available potassium were positively correlat-ed.In wheat -maize rotation farmland,the pH was negatively correlated with organic matter.The content of soil avail-able phosphorus was abundant in studied area,the content of alkali-hydrolyzable nitrogen was slightly high,the content of organic matter was slightly low,and the content of readily available potassium was deficient.The nutrient level of ki-wifruit orchards was relatively higher than that of wheat -maize rotation farmland as a whole,mainly associated with dif-ferent management and fertilization status.
国家科技期刊平台
NSTL
万方数据
维普
