| The effect of application of potassium on the yield of field pea water use efficiency and potassium in soil in sem-i arid area of Gansu |
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| DOI：10.7606/j.issn.1000-7601.2007.05.03 |
| Key Words: Huangmian soil potassium fertilizer field pea soil moisture dryland farming |
| Author Name | Affiliation | | XIE Kui-zhong | Agronomy Faculty Gansu Agricultural University,Lanzhou 730070,China | | HUANG Gao-bao | Agronomy Faculty Gansu Agricultural University,Lanzhou 730070,China | | LI Ling-ling | Agronomy Faculty Gansu Agricultural University,Lanzhou 730070,China | | XU Ai-xia | Agronomy Faculty Gansu Agricultural University,Lanzhou 730070,China | | ZHAO Jun-fan | Resources and Env ironment Faculty Gansu Agricultural University,Lanzhou 730070,China | | LI Zhong-wei | Agronomy Faculty Gansu Agricultural University,Lanzhou 730070,China |
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| Abstract: |
| The potassium application of field pea experiment was conducted in Huangmian soil in the semi-arid area of Gansu in 2006.The results showed that potassium in Huangmian soil was not enough for the growth of crop.Applying potassium could significantly increase the evapotranspiration and the yield factor of field pea,therefore,the yield,the water use efficiency and the economic coefficient of field pea were improved.Compared with CK,the application rate of K2 reached 37.5 kg/hm2,the yield,the evapotranspiration,the water use efficiency and the economic coefficient of field pea increased 26.7%,14.5%,10.5% and 17.2% respectively.And under this application rate,both the yield and the evapotranspiration were the highest.Mathematic model between the application potassium and the yield of field pea was y=0.0006x3-0.1576x2+10.973x+895.91. The potassium application rate at 43.4 kg/hm2,the economic efficiency reached the highest.Application potassium could increase the content of available potassium in soil and the content of total potassium in plants. |
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