聚合物类保水剂对山杏水肥利用效应的影响

研究了不同用量保水剂处理对干旱胁迫下山杏(Armenia casibirica)叶水势、根部氮磷钾及生物量(地上部分生物量、地下部分生物量、总生物量)、根冠比的影响。结果表明，不同处理下叶水势受到不同程度促进，且促进程度随保水剂用量增大而增大。山杏根部氮磷钾含量，因不同处理均有所变化，其中，氮含量变化最显著，随保水剂用量增大而增大。保水剂20g下氮含量是对照的1.66倍，钾含量基本无变化，而磷含量随保水剂用量增大而降低。处理可使山杏总生物量和地上部分生物量增大，而对照组的地下部分生物量和根冠比最大。山杏叶水势和根部氮含量相关性显著。研究结果表明，保水剂和复合肥的混施显著促进了山杏生长，其原因可能是其保水保肥及缓释的作用。

Effects of Super Absorbent Polymer on Water and Fertilizer Use of Prunus Armeniaca

The effects of different doses of super K in root and biomass(ground biomass,undo absorbent polymer(SAP) on leaf water potential,N,P and (ground biomass,total biomass),and root/shoot ratio of Prunus armeniaca were investigated in the Jiufeng experimental base.Leaf water potential of Prunus armeniaca was stimulated by SAP in a dose-dependent manner.The contents of N,P and K varied with different treatments.Specifically,the content of N increased significantly with the increase of SAP;N level under treatment of 20 g SAP was 1.66 times the contrast;K almost did not change;and the content of P was inhibited by SAP treatment.Total biomass and ground biomass increased in SAP treatment,whereas the maximums of underground biomass and root/shoot ratio occurred in contrast test.The content of N had a positive correlation with leaf water potential.The results suggest that the reason for good growth may be the water and fertilizer conservation effects of SAP on Prunus armeniaca.