| Study on ear characters of corn in film mulching on dulble-ridge plus furrow in dryland |
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| DOI：10.7606/j.issn.1000-7601.2011.06.15 |
| Key Words: film mulching on dulbel-ridge plus furow corn ear character yield regression function grey corre-lation degree analysis dryland |
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| Abstract: |
| Analysis was made of correlation and grey incidence order between ear characters and yield per plant of
47 hyprid corm varieties in film mulching on dulble ridge plus furrow in dryland， and regression curve ftting was also made of those with high grey correlation degree and significant correlation cofficients， so as to find out the degree of in-fluence of ear characters on corm yield. The results showed that， in this kind of culivation mode, the high yielding hy-brid corn had such ear characters as high, moderate 1000 grain weight， large number of grains per ear， short baldhead，small grain size and moderate ear size . The suitable coordinated indices of ear characters were 78% fertility， 250 g of 1000-grain weight，560~580 grains per ear, 5cm of ear diameter，18~20 rows of grains per ear and less than 1.4 cm of baldhead. It is very accurate and visual to describe quantitatively the correlation between different indicators of ear characters and their relationship with com yield with corresponding parameters and curves , meanwhile the biological key points can also be found in this way. |