| Study on the mechanism of yield increase of field pea by early sowing in Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2007.01.41 |
| Key Words: field pea different sowing date yield ecological effect |
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| Abstract: |
| The effects of different sowing dates for two varieties of field pea have been examined through field site observations in an arid area of the Loess Plateau over two years.The experiment focused on two varieties of field pea,Green pea,which has high yield,and Yannong 2,which has low yield.The results showed that the effect of sowing date on plant numbers was greater for Green pea than for Yannong 2.However,early sowing could improve unit area dry matter accumulation of Yannong 2,this effect on Green pea is not significant.With early sowing peas reached full bloom earlier,full bloom of Green pea was earlier than Yannong 2.Yields could also be improved as plants had much time to establish pea grains before the high temperature weather came.This was particularly true for Green pea and produced a significant difference in the yield of Yannong 2.Early sowing was shown to positively affect node number per plant,pod number per plant,grain number per plant and grain weight,and improved pea grains water use efficiency. |
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