Evaluation Of Land Suitability For Cash Crops In Xi’an Based On GIS

In this study,the spatial variation of soil pH,organic matter,total nitrogen,available phosphorus and available potassium in the study area was studied by using the combination of classical statistics,geostatistics and GIS in the study area of Xi’an,Shaanxi Province.Based on the requirements of kiwi,pomegranate,grape and melon on the natural environment,the land suitability evaluation factor system,including site conditions,soil nutrient status,soil traits and farmland management,was established to complete Study on Land Suitability Evaluation of Characteristic Economic Crops in Study Area.Research indicates:1.The average contents of OM,TN,AK and AP in surface soil were 16.97 g / kg,0.97 g /kg,164.58 mg / kg and 22.99 mg / kg,respectively.The soil nutrient and pH variation in the study area were:AP> AK> TN > OM> pH.2.The surface soil of the cultivated land is mainly neutral and alkaline,and it shows the acidic pattern of the northeastern part of the northeast.The OM content of cultivated soil is medium level,and the content of AK is very rich,but the distribution is very uneven.The content of AP is generally low in the southeast,west,northeast high pattern.4.The kiwi fruit,pomegranate,grape,melon and other special economic crops for land suitability evaluation.The results are as follows:(1)Highly suitable for kiwi cultivation of arable land accounted for 14.67%.Mainly distributed in Chang’an,Zhouzhi,Huxian,suitable for planting a total of 49.24% of cultivated land,counties(districts)are distributed,Lintong,Huxian,Zhou and Changan larger;barely suitable for cultivated land accounted for 16.53% Distribution Lintong,Lantian two counties(districts),not suitable for planting 19.56% of arable land,mainly in the Lantian,Lintong.(2)The land suitable for pomegranate cultivation is 54.25%,and the counties are distributed.Lintong,Chang’an,Huxian and Zhouzhi counties are more distributed.The suitable farmland is 25.85%,and the distribution of Lantian and Chang’an is more suitable.Of the farmland accounted for 10.21%,mainly in the Lantian,Lintong area;suitable for cultivated land accounted for 9.69%.Concentrated distribution in the Lantian,Lintong.(3)Highly suitable for grape cultivated land accounted for 36.65%,concentrated in Lintong,Chang’an,Huxian and Zhouzhi;The cultivated land suitable for cultivation is 38.19%,and the area of Chang’an and Zhouzhi is larger than that of Baqiao,Yanliang and Gaoling.The cultivated land is 13.41%,which is concentrated in Lantian and Lintong.%,Mostly located in Lantian,Lintong District..(4)Highly suitable for melon cultivation of farmland accounted for 52.32%.Mainly distributed in Lintong,Huxian,Changan and Zhouzhi;suitable for planting farmland accounted for 27.06%,Chang’an,Lantian,Lintong and Zhouzhi distribution more;barely suitable for planting farmland accounted for 10.29%,Lantian County distribution;10.34%,concentrated in the Lantian,Lintong and Zhouzhi.