夏季覆膜栽培对紫芯红薯生长及产量的影响

Effects of Summer Planting and Plastic Film Mulching on Growth and Yield of Purple Sweet Potato

为生产应用提供依据,在春种马铃薯收获后,采用黑白2种颜色地膜半覆膜方式,研究夏季覆膜栽培对紫芯红薯生长及产量的影响。结果表明:紫薯2号不同覆膜处理,覆白膜栽培的成活率为78.5%,比裸地种植(CK)高38.5%;黑-白膜和白膜覆盖处理的产量最高,均约2 000kg/667m2,分别比裸地种植增产98.0%和96.5%,差异达极显著水平;覆白膜处理单株结薯数最高,为5.8个/株,极显著高于CK。在不同紫芯红薯品种(系)覆白色地膜试验中,紫薯3号品系产量最高,达2 150kg/667m2;紫薯2号品系单株结薯数最高,为6.7个/株。结论:夏季种植紫芯红薯以白膜覆盖成活率高,丰产性好;紫薯3号品系适宜在贵州中部丘陵旱作区夏季覆膜种植。

In order to provide a reference for production application,explore the growth and yield of purple sweet potato planting after harvesting of the spring potato,the tests were studied by adopting black and white color （single and double）plastic film mulching cultivation and a few purple sweet potato varieties.In the test of the same variety with different plastic film mulching colors and ways,the results showed that the plant survival rate was 78.5% of the white plastic film mulching,more than 38.5%higher than that of bare land planting （CK）,that the yields of black-white and white plastic film mulching treatments were the highest with about 2 000 kg/667m^2 increased by 98.0% and 96.5% respectively compared with CK and reached 1% significant level,that the highest potato number per plant was white plastic mulching treatments with 5.8 and it was higher than that of CK at 1% significant level.In the test of different varieties with white plastic film mulching,the yield of the variety Purple-potato 3 was the highest with 2 150 kg/667m^2 .The highest potato number per plant （6.7）was variety Purple-sweet-potato 2.Conclusion：The survival rate and yield of the purple sweet potato with white plastic film mulching treatments was higher that of CK,the purple sweet potato variety of compatible summer planting was Purple-sweet-potato 3 in Guizhou central area.