钾肥对脱毒马铃薯产量及相关生理指标的贡献

On the Contribution of Potassium Fertilizer to the Output of the Virus-free Potato and Its Physiological Index

通过2年试验,研究了增施钾肥对脱毒马铃薯产量及相关生理指标的影响。试验表明,在当地习惯施肥基础上增施钾肥,提高了马铃薯产量、大中薯率、块茎淀粉含量和干物质含量,也提高了净同化率、叶绿素含量等生理指标。增施钾肥不同处理效果不同,以处理3、4效果最明显。根据增产提质效果及实际效益,推荐施肥量为:N100 kg/hm2、P2O580 kg/hm2、K2O 200 kg/hm2、农家肥104kg/hm2。

After two years＇ experiments,the effects of increasing potassium fertilizer on the Virus-free potato and its Physiological index are studied by the researchers.The result of the tests indicates that the potato output,the amount of the large-medium potatoes,the starch content and the commodity rate can be improved as well as leaf area index and chlorophyll content,and the assimilation rate and solids content can be increased by increasing the amount of potassium fertilizer on the basis of the usual fertilization in local area.The result of the tests shows that different disposal methods of potassium fertilizer lead to different production effects,and the most noticeable results are Test3 and Test 4.According to the effect of increasing production,enhancing quality and net benefit,we recommend the dosage：N 100kg/hm2,P2O5 80kg/hm2,K2O 200kg/hm2 and farmyard manure 10 000kg/hm2.