【摘 要】
：
调查了不同施肥(0 kg.hm-2、375 kg.hm-2、900 kg.hm-2 和1500 kg.hm-2)条件下毛竹林根系活力及酶活性,结果表明:(1)不同施肥量处理间根系活力差异显著(p＜0.05),根系活力随着施肥量的增加呈先升高后下降的趋势,当施肥量在900 kg.hm-2 时,根系活力达到最大.(2)不同施肥量处理间硝酸还原酶(NR)活性差异显著(p＜0.05).NR 活性与根系活力
【机 构】
：
浙江农林大学林业与生物技术学院,浙江临安 311300 丽水学院,浙江丽水 323000
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调查了不同施肥(0 kg.hm-2、375 kg.hm-2、900 kg.hm-2 和1500 kg.hm-2)条件下毛竹林根系活力及酶活性,结果表明:(1)不同施肥量处理间根系活力差异显著(p＜0.05),根系活力随着施肥量的增加呈先升高后下降的趋势,当施肥量在900 kg.hm-2 时,根系活力达到最大.(2)不同施肥量处理间硝酸还原酶(NR)活性差异显著(p＜0.05).NR 活性与根系活力有类似的变化趋势,以施肥量900 kg.hm-2 的酶活力最高.(3)根系谷氨酰胺合成酶活性与可溶性蛋白含量呈显著的正相关(r=0.5958,n=12,p＜0.05),谷氨酰胺合成酶活性和可溶性蛋白含量均随着施肥量的增加而增加.(4)根系酸性磷酸酶活性与可溶性蛋白含量呈极显著的负相关(r=0.8057,n=12,p＜0.01),酸性磷酸酶活性随施肥量的增加而减小,而可溶性蛋白含量随施肥量增加而增加.
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