养分综合管理对马铃薯抗冻性的影响

内蒙古马铃薯生产中面临倒春寒和秋早霜的冻害威胁，特别是秋早霜如果较重将造成产量的大幅下降。因此，尽可能提高马铃薯抗冻性对内蒙古马铃薯产业发展具有重要意义。本文从养分综合管理的角度出发，研究了马铃薯叶片矿质元素含量以及叶面积指数与马铃薯抗霜冻性的关系。结果表明，马铃薯叶片中氮磷钾含量以及叶面积指数均与其抗霜冻性存在相关关系，其中，氮肥处理的叶面积指数变化与霜冻损害评分的相关性最为显著，相关系数达-0.948，该处理下叶面积指数变化对霜冻损害评分影响幅度达到1.6，同样为各处理中最高值。

Effect of Potato Integrated Nutrient Management on Freezing Resistance

Potato planting in Inner- Mongolia is threatened by cold injury including late spring coldness and early autumn frost, especially heavy frost in autumn always results in a substantial loss of potato yield. Thus, improve potato’s frost resistance is meaning for the potato industry development in Inner Mongolia. Out of the view of nutrient management, research was on the relationship between mineral elements content of potato leaf and leaf area index and potato plant’s frost resistance here. Result shows that, Both Nitrogen, phosphorus, potassium and potato leaf area index has a close relationship with frost resistance, of them, the correlation of change of leaf area index under nitrogen treatment and frost damage score is the most significant date, and its coefficient is 0.948, the effect of change of leaf area index on the frost damage score is 1.6, also the highest value among all treatments.