氮肥基追肥比例对马铃薯微型薯生产的影响

为探讨马铃薯微型薯合理的氮肥施肥方式,以‘早大白’马铃薯脱毒试管苗为材料,在温室内进行了氮肥不同基施和追施比例对马铃薯微型薯生产影响的试验。结果表明:在施氮肥量为纯氮105 kg/hm2条件下,单株结薯方面,基追比为5:2时,单株结薯最多,全部做基肥的处理,单株结薯最低;单粒重方面,基追比为2:1时,单粒重最大,全部追肥的处理最低。可见氮肥基施和追施配合有利于提高单株结薯率及平均单粒重。因此,微型薯生产重视氮肥基施同时配合追施比较符合移栽的试管苗对氮肥的吸收规律。

Effects of Ratio of Basal and Additional Application of Nitrogen Fertilizer on Minituber Production

To investigate the effects of basal and addition nitrogen(N) fertilizer application on the yield of potato minituber,the experiment was carried out in a greenhouse,using in vitro plantlets of 'Zaodabai' as the test material.With a rate of 105 kg N/ha application,the tuber set per plant was the highest in the treatment of ratio of basal and additional fertilizer being 5: 2,while the tuber set per plant was thelowest in the treatment using all of N fertilizer as basal fertilizer.The treatment of basal and additional N fertilizer in 2 : 1 gave the highest tuber weight,while N feritilizer when used all as additional fertilizer produced smallest tubers.These results suggested that combination of basal and additional N fertilizer application could improve the plant tuber set and the tuber weight per plant.Therefore,basal N fertilizer combined with additional N fertilizer could meet N absorption pattern of plantlets transplanted and should be a reasonable N fertilizer application strategy for the production of minituber.