摘要
采用黑色膜、透明膜和露地3种甘薯栽培方式,研究覆膜栽培对甘薯生长动态及产量的影响。结果表明,覆膜前期增温保温作用显著,5～15cm地温平均比露地提高3.8～4.9℃;覆膜提墒保墒作用以10cm处效果最佳,黑色膜保水效果优于透明膜;地膜覆盖促进了甘薯早期生长发育,早缓苗3d,分枝提前2～3d,封垄提前3～4d,栽插后50d叶面积系数比露地提高,50～90d甘薯下部单株日生长量黑色膜为18.8g,透明膜为16.1g;覆膜后,光合物质能较快地分配到地下部,获得较高的经济产量,透明膜与黑色膜覆盖比露地栽培分别增产21.2%、26.0%,大中薯率均约比露地高11.0%。
An experiment was carried out to investigate effects of three farming practices, white plas- tic film and black plastic film mulching practices and the conventional planting practice （planting prac- tice without mulching） on dynamic growth and yield of sweetpotato by measuring soil temperatures, soil water contents, and underground and aboveground dynamic growth parameters of sweetpotato. The result showed that the mulching practices could significantly increase soil temperature during the early growth of sweetpotato and the soil temperature at 5--15 cm soil depths in the mulching practices were 3.8--4.9 ℃ higher than in the conventional planting practice; the mulching practices took the best effect on promoting soil water to move upward and conserving soil moisture at the soil depth of 10 cm, moreover, the black plastic film mulching practice performed better effect on water conservation than the white plastic film mulching practice; the mulching practices were able to promote early growth of transplanted sweetpotato seedlings, with 3 days earlier recovering and 2- 3 days earlier branching and 3--4 days earlier canopy-closing, compared with the conventional planting practice; at the 50th day after transplanting, the leaf area index in the mulching practices was higher than in the conventional planting practice. During 50--90 days after transplanting, the daily mass gain of underground parts in the black and white plastic film mulching practices was 18.8 and 16.1 g; the T/R rati- os and underground photosynthate allocation in the mulching practices varied more reasonable than in the conventional planting practice, and the economic yield of sweetpotato in the former was higher
than in the latter; mulching practices mg practice the yield, percentage of were separately 21.2% large size and 26.0%, 11. 0% root, and root number per plant in the higher than in the conventional plant
出处
《西北农业学报》
CAS
CSCD
北大核心
2013年第7期107-113,共7页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家甘薯产业技术推广体系项(CARS-11)
关键词
甘薯
地膜
动态
产量
Sweet potato
Plastic film
Dynamic
Yield
