| Research on the best model of cultivation of high yield hybrid rape variety Qingza No.2 in Chaidamu area |
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| DOI：10.7606/j.issn.1000-7601.2008.05.11 |
| Key Words: hybrid rape Qingza No.2 Chaidamu area cultivation technology |
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| Abstract: |
| For programing seeds'yield of rape variety Qingza No.2, by applying regressive experiment method of orthogonal conic substitution with three factors，research was made to find out the regression relationship between the density, N and P fertilizer application and the seeds' yield. The results showed that the yield increased with the increasing of planting density, N, P fertilizer application amount. When the planting density and N and P fertilizer application realize the best amount, the yield could realize the highest level. But over that amount would make the yield gradually decrease. Combining low and -middle level density and high N fertilizer application or high level density and low N fertilizer applicationt, the rape yield was high. The yield would increase with the increasing of P（N）fertilizer application in low N（P）fertilizer level. The yield will increase first and then decrease with the increasing of P （N）fertilizer application amount, in the middle and high N（P）fertilizer level. The best model of cultivation of hybrid rape variety Qingza No.2 in Chaidamu area is: planting density of 38.9×104 grain/hm-2，and N and P application amount at the rate of 90 kg·hm-2，71.75 kg·hm-2，respectively. |
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