甜玉米果穗不同计产方法对产量评价的影响

以30个鲜食甜玉米品种为试材,研究果穗不同计产方法(第1果穗计产、所有果穗计产和商品果穗计产)对产量评价的影响。结果表明,3种计产结果在甜玉米不同品种间存在极显著差异,第1穗净果穗计产结果比商品穗产量高0～35.78%(除个别品种外);所有净穗计入产量结果比商品穗产量高0.08%～35.78%,且各百分率在不同品种间存在差异,以商品果穗计产比较科学。商品果穗标准为非霉变果穗,除去苞叶、花丝、穗柄、虫咬、损伤、秃尖及秃基部分的完好净穗有效长度至少不短于10cm的果穗。

Effects of Different Ear Yield Calculating Methods on Yield Evaluation in Sweet Corn

In this study, yield with the first ear excluding bract and pedicel, yield with all net ears including bract and pedicel, and the commercial ear yield were detected at 21 days after pollination in a randomized complete block design using 30 sweet corn cultivars. The results showed that among various ear yield calculating methods, the yield was 0 - 35.78% higher than the commercial ear yield when it was calculated with the first ear excluding bract and pedicel. The yield was 0.08% - 35.78% higher than the commercial ear yield when it was calculated with all net ears including bract and pedicel in sweet corn varieties. And the percentage of increment was significantly different in varieties. Commercial ear yield calculating method was adaptive to sweet corn ear yield evaluation. The standard of commercial ear was that the ear part excluded unvalued parts(mildew ear, bract and silk, barren ear tip, pedicel, and damnification part), and the length was longer than 10 cm.