摘要
为了促进黄土丘陵沟壑区人工柠条群落的更新,以定西市巉口镇龙滩流域的人工柠条群落为研究对象,对其5种平茬处理方式(全部平茬、隔株平茬、隔行平茬、隔株隔行平茬、未平茬)下3个土层深度(0~20、20~40、40~60cm)的8个土壤养分指标(pH值、有机质含量、全氮含量、全磷含量、全钾含量、碱解氮含量、有效磷含量、速效钾含量)进行了测定和分析研究。结果表明:平茬方式对土壤养分的影响不明显,不同平茬方式间土壤养分含量差异不显著;土层深度对土壤养分的影响很明显,不同土层间土壤养分含量差异显著,尤其是有机质、全氮和碱解氮含量,而且土壤养分含量总体上呈现出随着土层深度的增加而下降的趋势,养分呈一定的表聚效应。
In order to promote the renewal of artificial Caragana korshinskii community in the gullied rolling loess area,the paper took the artificial Caragana korshinskii community in Longtan watershed in Chankou Town of Dingxi City as a studied area,measured and analyzed 8 soil nutrients(pH value,organic matter,total nitrogen,total phosphorus,total potassium,alkaline hydrolysis nitrogen,available phosphorus and available potassium)of 3 soil depths(0-20,20-40 and 40-60 cm)under the conditions of 5 kinds of stubble treatments(total stumping,stubble of every other plant,stubble of every other row,stubble of every other plant and row and no stubble).The outcomes show that a)the influence of stubble to the nutrient content is not obvious and the difference of nutrient content under the conditions of different stubble treatments is not remarkable and;b)the influence of soil depth to the soil nutrient is obvious,the difference of nutrient content under the conditions of different soil layers is remarkable,especially the contents of organic matter,total nitrogen and alkaline hydrolysis nitrogen and the soil nutrient content shows a trend of decrease along with the increase of soil depth and nutrients show a certain surface aggregation effect.
作者
薛睿
柴春山
马驰
刘燕萍
XUE Rui;CHAI Chunshan;MA Chi(Gansu Academy of Forestry Science and Technology,Lanzhou,Gansu 730020,China)
出处
《中国水土保持》
2019年第7期49-51,I0001,共4页
Soil and Water Conservation in China
基金
“十二五”国家科技支撑计划项目(2015BC01B0002)
国家重点研发计划项目(2017YFC0504603)
关键词
柠条人工林
土壤养分
特征
黄土丘陵沟壑区
artificial Caragana korshinskii forest
soil nutrients
characteristic
gullied rolling loess area
