川西南山地马铃薯原种扩繁适宜播期和密度及水分利用研究(英文)

目的]了解峨边县海拔1200~1500m区域原种繁育基地春播马铃薯适宜的播期和密度。方法]以川芋13脱毒原原种为材料,在大田条件下研究播期和密度对春播马铃薯生育期、出苗率、产量和水分利用效率的影响。结果]随播种期的推迟,马铃薯播种至出苗天数缩短、出苗率提高、单株结薯数、群体中小薯数、产量和水分利用效率增加;播种密度对马铃薯播种至出苗天数、出苗率没有影响,但随播种密度的增加,单株结薯数、群体中小薯数、产量和水分利用效率显著增加。结论]在峨边县海拔1200~1250m地区,马铃薯适宜的播种期为2月9日至3月1日,适宜的播种密度为12.0万窝/hm2,但最佳密度还未出现峰值,有待于进一步加大密度进行研究。

Suitable Date of Seeding, Planting Density and Water Use Efficiency for Propagation of Stock Seed Potato in Mountainous Region of Southwest Sichuan

Objective] The experiment was conducted to study suitable date of seeding and density of spring potato at the stock breeding base in Ebian County at an elevation of 1 200 to 1 500 m.Methods] Virus-free Potato "Chuanyu 13" was used as material to study the effects of date of seeding and density on growing period,germination rate,yield and water use efficiency of spring potato in the field.Result] With the postponement of date of seeding,the days from sowing to germination shortened,while the germination rate,the number of tubers per plant,the number of middle and small tubers in a group,yield and water use efficiency all increased.Planting density had no effects on the days from sowing to germination and the germination rate,while the number of tubers per plant,the number of middle and small tubers in a group,yield and water use efficiency increased significantly along with the increasing planting density.Conclusion] At an elevation of 1 200 m to 1 250 m in Ebian County,the suitable date of seeding for potato was from February 9 to March 1,and the suitable planting density was 12×104 plants per hm2,however,in the optimum planting density has not been found so that it needs further research.