| Phosphorus supply ability of soils and optimum phosphorus application rate for vegetables in the qreenhouses in Hexi Corridor |
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| DOI：10.7606/j.issn.1000-7601.2011.03.32 |
| Key Words: phosphorus supply capacity vegetable phosphorus optimum application amount |
| Author Name | Affiliation | | QIN Jiahai | Department of Agronomy,Hexi University, Zhangye ,Gansu 734000,China | | CHEN Xiubin | Department of Agronomy,Hexi University, Zhangye ,Gansu 734000,China | | XIAO Zhanwen | Department of Agronomy,Hexi University, Zhangye ,Gansu 734000,China | | WANG Pei tang | Linze County Agricultural Technology Promotion Center,Zhangye, Gansu 734000,China | | SHENG Changcun | Gaotai County Agricultural Extension Station, Zhangye, Gansu 734000,China | | WANG Shengwen | Ganzhou District Agricultural Technology Extension Station, Zhangye, Gansu 734000,China |
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| Abstract: |
| A field experiment was conducted to study the phosphorus supply capacity of the main soil types and opti-
mum application amount of phosphorus for vegetables in greenhouses in the Hexi Corridor. The results show that， for saline soil， dark irmigated desert soil, light irigated desert soil, Chao soil and irigated desert soil, the minimum phos-phorus supply capacity of 0~20 cm topsoil was 12. 26 kg/hm2, while the maximum was 18.78 kg/hm2, wirh an average of 15.30 kg/hm2. The regression statistical analysis showed that the optimum economic fertilization rate of phosphorus
was 182, 269, 49, 468 and 60 kg/hm2 for squash, cucumber, eggplant, tomato and pepper respectively, with which the theoretical yield was 83.9, 82.2, 65.4, 98.4 and 72.3 t/hm2 . The result of regression analysis was consistent with that of field test. |
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