论文部分内容阅读
在16年生千年桐人工林中按5种分解模式(模式A:千年桐叶100%;模式B:毛竹叶100%;模式C:千年桐叶50%+毛竹叶50%;模式D:千年桐叶75%+毛竹叶25%;模式E:千年桐叶80%+毛竹叶20%)进行千年桐、毛竹凋落叶及其混合分解的野外模拟试验,分析千年桐与毛竹凋落叶混合分解对土壤酶活性的影响及其与凋落物主要营养元素全氮(TN)、全磷(TP)、全钾(TK),微量元素钠(Na)、钙(Ca)、锰(Mn)、镁(Mg)、锌(Zn)及有机碳(OC)的释放量之间的关系.结果表明:5种模式叶凋落物分解1年后TN、TP、TK、OC和Na、Ca、Mn、Mg、Zn的释放量大小并不一致,不同元素释放量在5种分解模式之间均存在显著差异;5种混合分解模式下,蔗糖酶和过氧化氢酶的最强活性区均出现在5～10 cm土层,其中蔗糖酶活性比较为模式E>C>A>CK>D>B,过氧化氢酶活性比较为模式E>CK>B>D>A>C.80%千年桐叶+20%毛竹叶的配比对土壤蔗糖酶和过氧化氢酶活性的增强作用比较明显,在实际的人工林栽培中,可考虑以千年桐和毛竹4:1的比例进行毛阔混交林的营造,以最大程度地增强土壤肥力,提高土壤质量,促进两种树种的共同生长.图2表2参37
In the 16-year-old Millennium tree plantation by 5 decomposition modes (pattern A: Millennium leaves 100%; Pattern B: 100% of the leaves of bamboo; Pattern C: Millennium leaves 50% + leaves 50%; Pattern D: Leaf Eucalyptus and Phyllostachys pubescens leaves 75% + Phyllostachys pubescens leaves 25%; Pattern E: Millettia leaves 80% + Phyllostachys pubescens leaves) field simulation experiments were carried out to analyze the mixed decomposition of millet trees (TN), total phosphorus (TP), total potassium (TK), sodium, calcium, manganese and magnesium in the litter Zn and organic carbon (OC) released from the five kinds of foliar litters were analyzed.The results showed that TN, TP, TK, OC and Na, Ca, Mn, Mg, Zn The results showed that there were significant differences among the five decomposition modes in the five kinds of decomposition modes. The highest activity range of sucrase and catalase appeared in 5 ~ 10 cm soil The activity of sucrase was compared with that of the model E> C> A> CK> D> B, and the catalase activity was mode E> CK> B> D> A> C.80% Leaf ratio on soil invertase and catalase activity Strong effect is obvious, in the actual plantation cultivation, we can consider Millettia and bamboo ratio of 4: 1 for the construction of broad-leaved forest in order to maximize soil fertility and improve soil quality and promote the two species Grow together. Figure 2 Table 2 Reference 37