| Effects of different P applications on inorganic-P components in irrigated sierozems under maize/chickpea intercropping |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.014 |
| Key Words: maize/chickpea intercropping P application rate inorganic-P component irrigated sierozems Gansu Yellow River Irrigation District |
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| Abstract: |
| The dosage effects of phosphorous applications on yield of maize and chick-pea under mono-cropping and intercropping systems were investigated using Jiang-Gu inorganic phosphorus fractionation method in irrigated sierozems in Gansu Yellow River Irrigation District. The results showed that the contents of inorganic phosphorus were in the following order: O-P>Ca10-P>Ca8-P>Al-P>Fe-P>Ca2-P. With the increased uses of phosphate fertilizer, the contents of Ca2-P, Ca8-P, Al-P, and Fe-P had increased significantly, whereas the contents of O-P and Ca10-P did not show apparent changes. The inorganic P contents looked similar between mono-cropped and intercropped chickpeas, but lower in intercropped maize than mono-cropped one. Particularly, it was found that the Al-P at P40 level (P application rate of 40 kg·hm-2), Fe-P at P0 (Without P application) level, and Ca10-P at P80 level (P application rate of 80 kg·hm-2) of intercropped maize were significantly lower than those of mono-cropped one. |
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