| Effect of solid active organic fertilizers on physicochemical properties and economic benefits of corn field in Hexi inland irrigation district |
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| DOI：10.7606/j.issn.1000-7601.2012.03.23 |
| Key Words: solid active organic fertilizer corn field physicochemical properties corn economic benefits |
| Author Name | Affiliation | | QIN Jiahai | Hexi University, Zhangye, Gansu 734000, China | | WANG Aiqin | Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gonsu 731000, China | | YAN Zhibin | Dunhuang Sed Company, Jiuquan, Gansu 735000, China | | XIAO Zhanwen | Hexi University, Zhangye, Gansu 734000, China | | ZHAO Yunchen | Hexi University, Zhangye, Gansu 734000, China | | ZHANG Hongju | Hexi University, Zhangye, Gansu 734000, China | | ZHANG Chunmei | Hexi University, Zhangye, Gansu 734000, China | | CHENG Hongyu | Hexi University, Zhangye, Gansu 734000, China | | TIE Dandan | Hexi University, Zhangye, Gansu 734000, China |
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| Abstract: |
| An experiment was conducted in the field with eight-year continious corn planting in Xexi inland irriga-tion district of Gansu to study the relationship between the amount solid active organic fertilizer and physieoehemical prop-erties of corn field and economic benefits of corn production. The results show that: the best combination of solid active organic fertilizer is furfural residue:45 t/hm2, cow dung:67.50 t/hm2, bio-fertilizer:0.06 t/hm2, polyvinyl alcohol:0.03 t/hm2, water retention agent:0.06 t/hm2; The amount solid active organic fertilizer was positively correlated with soil porosity, aggregate structure, water storage, content of organic matter, available phosphorus and potassium and EC, while it was negatively correlated with soil bulk density and pH; With the increase of solid active organic fertilizer,the corn yield increases, but the increasing amount resulting from per unit(1 kg) solid active organic fertilizer, declines along with the increase of the fertilizer, presenting the law of diminishing returns; On the basis of the amount of 112 t/hm2 solid active organie fertilizer, additional 28.00 t/hm2 fertilizer brings about negative profit margin; Through regression analysis, it is found that the best applieation rate of solid active organic fertilizer is 111.40 t/hm2, when the theoretical corn yield is 7.28 t/hm2. |
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