| Soil nutrient limiting factors of irrigation desert soils in Hexi Region, Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2003.02.12 |
| Key Words: irrigation desert soils nutrient limiting factor jowar 5 Hexi region in Gansu |
| Author Name | Affiliation | | ZHAO Liang-ju | Cold and Arid Regions Environement and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | XIAO Hong-lang | Cold and Arid Regions Environement and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | LIU Xiao-hong | Cold and Arid Regions Environement and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China | | GUO Tian-wen | Institute of Soil and Fertilizer Gansu Agricultural Academy Sciences, Lanzhou 730000, China |
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| Abstract: |
| The status of nutrients of four irrigation desert soils at Zhangye, Wuwei, Jinchang and Minqin, in Gansu Province were studied using pot culture experiments. The results show that there are lacking N and Cu in soil of Jiugongli from Zhangye. Compared to OPT treatment, the crop biomass declined 45. 81% and 17. 44%. The limiting nutrient factors are N, P, S and Cu in soil from Wu-wei; and limiting nutrient factors are N, P, Cu, Fe and Zn in soil from Minqin. The soil collected from Xiaojinzi farm-land is short of P, N, Mn and Zn. There are short of N and P in the soils at Hexi region at largely. The minim nutrients are lack in some irrigation desert soils in Hexi region, Gansu. |
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