|
| Effects of mechanical sowing on yield formation of different sweet corn varieties in southern area |
| |
| DOI：10.16768/j.issn.1004-874X.2018.02.001 |
|
| Hits: 2121 |
| Download times: 761 |
| Abstract: |
| In order to form the technology of agricultural machinery and agronomy，the sweet corn varieties
suitable for machinery sowing were selected in the southern fresh corn area. This study used 6～7 sweet corn
varieties and spoonful double row planter. The mechanical seeding experiments were carried out in ridge cultivation
in Pearl River Delta（ spring of 2016） and various cultivation in the west of Guangdong Province（ spring of 2017）， respectively. The effects of machinery sowing on the yield formation of different sweet corn varieties were studied.
The results showed that the fresh ear yield of Yuetian 28，Yuetian 27 and Yuetian 26 was the top three，and the yield
stability was well in the two seasons，the average fresh ear yield of two seasons were 16 919.6，17 910.0，15 320.4
kg/hm2，respectively. Among 7 varieties，there were 4 varieties with seed germination rates in more than 85%，
germination potential in more than 50% of all varieties. From the perspective of germination，we can preliminary
screening suitable mechanical sowing of sweet corn varieties. In ridge cultivation and various cultivation，seedlings
emergence per hole were 0.81～1.22 and 0.67～1.73 respectively. After thinning without filling the gaps with
seedlings，the average rates of surviving seedings were 87.6% and 82.8% respectively. The highest surviving rates
of the top three，in turn，were Yuetian 28，Yuetian 27，Yuetian 26 in ridge cultivation，and were Yuetian 27，
Zhengtian 68 and Yuetian 28 in various cultivation. The result shows that from the perspective of seeding survival rate
can preliminary screening suitable for mechanical sowing of sweet corn varieties. Two seasons of field trials showed
that the highest uniformity of the top three varieties in seedling stage were Yuetian 28，Yuetian 27，and Zhengtian
68. Conclusion，from the seed germination rate，germination potential，rates of surviving seeding，and yield stability
can preliminary screening suitable for mechanical planting varieties. From two sites and seasons of the test shows that
Yuetian 27 and Yuetian 28 with higher germination rate，germination potential and seedling uniformity，and stability
of fresh ear yield，are suitable for mechanical sowing. |
|
View Full Text
View/Add Comment Download reader |
