杂交元胡新品种栽培技术的研究

Study on the Cultural Practice of New Hybrid Yuanhu

对杂交元胡新品种的一些栽培措施进行了研究。新品种的种植密度：小块茎（2．3～2．8g／个）作种，以繁殖为目的，密度50～75个／m2，以生产为目的，100个／m2。大中块茎作种，生产上可用75个／m2的密度；种植深度10cm左右时繁殖系数大产量高；杂交元胡在北方种植必须灌水。采用土壤湿度计负压值作为指导灌溉信号，综合考虑提高繁殖系数，节约用水，灌水开始点以26．7kPa为佳，超过40kPa浇水严重减产。采用平畦、覆盖稻草等措施，应管浇灌与滴灌的产量无显著差异。

Some cultural practices of a new hybrid yuanhu were reported. The planting deusity of thc new variety wast using small seed tubers (2.8g/Per tuber ), 50~75 tubers/m2 for reprodu ction purpose, 100 tubers/m2 for high yield. 75 tubers/m2 was a suitable density when large or middle seed tubers was used. High reproduction coefficient and yield were obtained when the planting depth was 10cm. It was necessary to irrigate the hybrid yuanhu in North China.Adopting the negative pressure valuc of soil tumidometer as the guide of beginning to irrig ate and to obtain high reproduction cocfficient and to save water, 26.7kPa would be adopted as the initial point of irrigation, excecding 40.0 kPa led to a serious reduction of yield. The difference of yield between rubber tuber irrigaticn and drip irrigation treatment was not obvious, when planting with covering straw in level bed.