现代农业科技
現代農業科技
현대농업과기
XIANDAIHUA NONGYE
2015年
6期
203-205,225
,共4页
红壤丘陵区%不同林分类型%土壤酶活性%土壤养分
紅壤丘陵區%不同林分類型%土壤酶活性%土壤養分
홍양구릉구%불동림분류형%토양매활성%토양양분
red soil hilly region%different forest stands%soil enzyme activities%soil nutrient
以红壤丘陵区马尾松纯林（PM）、马尾松+枫香针阔混交林（PMLF）和天然次生林（NSF）为研究对象，通过“外调查和室内分析，研究了不同林分类型土壤酶活性和养分特征及其二者的相关性。结果表明：各土层（0~10 cm和10~20 cm）中，马尾松纯林有机质、全氮、硝态氮、速效磷和速效钾含量显著低于马尾松+枫香针阔混交林和天然次生林（P<0.05）；各土层马尾松纯林铵态氮含量显著低于天然次生林（P<0.05），与马尾松+枫香针阔混交林差异不显著（P>0.05）；天然次生林和马尾松+枫香针阔混交林林地各土层蔗糖酶、过氧化氢酶、脲酶和碱性磷酸酶活性在总体上显著高于马尾松纯林（P<0.05）；除过氧化氢酶与铵态氮和速效磷无显著相关性（P>0.05）外，土壤酶活性与养分间均呈现显著（P<0.05）或极显著（P<0.01）相关性。与马尾松纯林相比，马尾松+枫香针阔混交林可以明显改善林地内土壤酶活性和养分状况，改善林地生态环境。
以紅壤丘陵區馬尾鬆純林（PM）、馬尾鬆+楓香針闊混交林（PMLF）和天然次生林（NSF）為研究對象，通過“外調查和室內分析，研究瞭不同林分類型土壤酶活性和養分特徵及其二者的相關性。結果錶明：各土層（0~10 cm和10~20 cm）中，馬尾鬆純林有機質、全氮、硝態氮、速效燐和速效鉀含量顯著低于馬尾鬆+楓香針闊混交林和天然次生林（P<0.05）；各土層馬尾鬆純林銨態氮含量顯著低于天然次生林（P<0.05），與馬尾鬆+楓香針闊混交林差異不顯著（P>0.05）；天然次生林和馬尾鬆+楓香針闊混交林林地各土層蔗糖酶、過氧化氫酶、脲酶和堿性燐痠酶活性在總體上顯著高于馬尾鬆純林（P<0.05）；除過氧化氫酶與銨態氮和速效燐無顯著相關性（P>0.05）外，土壤酶活性與養分間均呈現顯著（P<0.05）或極顯著（P<0.01）相關性。與馬尾鬆純林相比，馬尾鬆+楓香針闊混交林可以明顯改善林地內土壤酶活性和養分狀況，改善林地生態環境。
이홍양구릉구마미송순림（PM）、마미송+풍향침활혼교림（PMLF）화천연차생림（NSF）위연구대상，통과“외조사화실내분석，연구료불동림분류형토양매활성화양분특정급기이자적상관성。결과표명：각토층（0~10 cm화10~20 cm）중，마미송순림유궤질、전담、초태담、속효린화속효갑함량현저저우마미송+풍향침활혼교림화천연차생림（P<0.05）；각토층마미송순림안태담함량현저저우천연차생림（P<0.05），여마미송+풍향침활혼교림차이불현저（P>0.05）；천연차생림화마미송+풍향침활혼교림임지각토층자당매、과양화경매、뇨매화감성린산매활성재총체상현저고우마미송순림（P<0.05）；제과양화경매여안태담화속효린무현저상관성（P>0.05）외，토양매활성여양분간균정현현저（P<0.05）혹겁현저（P<0.01）상관성。여마미송순림상비，마미송+풍향침활혼교림가이명현개선임지내토양매활성화양분상황，개선임지생태배경。
The soil enzyme activities,nutrient contents and their relationship were studied in different forest stands(i.e.Pinus massoniana,mixed forest of Pinus massoniana+Liquidambar formosana and natural secondary forest)in red soil hilly region.The results showed that the content of soil organic matter,total nitrogen,nitrate nitrogen,available phosphorus and available kalium in two soil layers(0~10 cm、10~20 cm)under the Pinus massoniana(PM)forest stand were significant lower than those under Pinus massoniana+Liquidambar formosana(PMLF)forest and natural secondary forest(NSF)stands(P<0.05).The content of ammonium nitrogen in two soil layers(0~10 cm、10~20 cm)under the PM forest stand was similar with the PMLF forest(P>0.05),but was significant lower than the NSF stands(P<0.05).With few exceptions,all soil enzyme activities under the PMLF and NSF stands were significant higher than under the PM stand(P<0.05).There was a significant correlation between soil enzyme and nutrient,except the correlation between hydrogen peroxidase and both ammonium nitrogen and available phosphorus.Comparing to the PM forest stand,the mixed forest of PMLF could obviously improve soil enzyme activities,nutrient contents and ecological environment in the stand.
