a国产,中文字幕久久波多野结衣AV,欧美粗大猛烈老熟妇,女人av天堂

施肥對荒漠草原土壤呼吸和溫室氣體通量的影響

發(fā)布時間:2019-07-06 12:07
【摘要】:以短花針茅荒漠草原為研究對象,在不同施肥處理條件下采用LI-8100碳通量測量儀和暗箱方法研究了土壤呼吸速率的季節(jié)變化與年際動態(tài)、溫室氣體排放通量的季節(jié)變化、以及它們與其它影響因子之間的關(guān)系,其結(jié)果如下:1.土壤呼吸速率(1)施氮肥提高土壤呼吸速率,其大小關(guān)系表現(xiàn)為N10CKN5N2.5;N、P、 NP小區(qū),NP配施顯著提高了土壤呼吸速率,三者大小關(guān)系為NPPCKN10;(2)隨著溫度升高,土壤呼吸速率隨之增加并在7月中旬和8月中旬達(dá)到峰值,與未施肥小區(qū)相比,施肥并沒有改變土壤呼吸速率的變化規(guī)律;(3)土壤呼吸速率與5 cm土壤溫度及0-10 cm土壤含水量正相關(guān),荒漠草原主要影響土壤呼吸速率因子為土壤溫度和土壤含水量。2.生態(tài)系統(tǒng)溫室氣體通量(1)在三個不同N梯度小區(qū)內(nèi),CH4吸收通量大小關(guān)系為CKN2.5N10N5, CO2排放通量大小關(guān)系為N5CKN10N2.5, N20排放通量大小關(guān)系為CKN5 N2.5N10;在N、P、NP三個施肥小區(qū)內(nèi),CH4吸收通量大小關(guān)系為PCK NPN10, CO2排放通量大小關(guān)系為NPPCKN10, N20排放通量大小關(guān)系為CKNPPN10;(2)在整個生長季,與為施肥小區(qū)相比,施肥并沒有改變溫室氣排放通量的變化規(guī)律,在7月分別達(dá)到了吸收和排放峰值;(3)溫室氣體通量與土壤5 cm地溫及0~10cm土壤含水量顯著相關(guān),主要影響溫室氣體排放通量的環(huán)境因子為土壤溫度和土壤含水量。
文內(nèi)圖片:圖1研究區(qū)布置逡逑Fig.邋1邋The邐study邋area邋layout逡逑
圖片說明:圖1研究區(qū)布置逡逑Fig.邋1邋The邐study邋area邋layout逡逑
[Abstract]:The seasonal variation of soil respiration rate and interannual dynamics, the seasonal variation of greenhouse gas emission flux, and the relationship between them and other influencing factors were studied by LI-8100 carbon flux measuring instrument and dark box method under different fertilizer treatment conditions. The results are as follows: (1) the seasonal variation of soil respiration rate and interannual dynamics, the seasonal variation of greenhouse gas emission flux, and the relationship between them and other influencing factors are as follows: 1. Soil respiration rate (1) nitrogen fertilizer increased soil respiration rate, the relationship between soil respiration rate was N10CKN5N2.5 N2.5, P, NP plot, NP combined application significantly increased soil respiration rate, the relationship was NPPCKN10; (2) with the increase of temperature, soil respiration rate increased and reached the peak in mid-July and mid-August. Compared with unfertilized plot, fertilizer did not change the change of soil respiration rate. (3) soil respiration rate was positively correlated with 5 cm soil temperature and 0 鈮,

本文編號:2510994

資料下載
論文發(fā)表

本文鏈接:http://www.wukwdryxk.cn/yixuelunwen/dongwuyixue/2510994.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶e4dba***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com
国产XXXX99真实实拍| 伊人久久大香线焦AV综合影院| 免费又黄又爽1000禁片| 久久精品手机观看| A级毛片高清免费视频| 国产精品五月天| 一边捏奶头一边啪高潮视频| 少妇高潮流白浆在线观看| 经典国产乱子伦精品视频| 日本伊人精品一区二区三区 | 泰安市| 国产噜噜噜噜久久久久久久久| …久久精品99久久香蕉国产 | 少妇WWWB搡BBB搡BBB| 别揉我奶头~嗯~啊~少妇| 东京热久久无码影院| 国产精品久久久久久福利| 国产日产欧洲无码视频无遮挡 | 超清av在线播放不卡无码| 国产老熟女网站| 亚洲老熟女@TubeumTV| 欧洲无码一区二区三区在线观看 | 国产精品999| 丝袜+亚洲+另类+欧美+变态| 亚洲精品国产综合久久久久紧| 亚洲成无码人在线观看| 亚洲成a人v欧美综合天堂| 性一交一乱一伦一色一情丿按摩| 无码αv人妻一区二区三区| 在线新拍精品国产91| 蜜桃精品免费久久久久影院| 人人爽天天碰天天躁夜夜躁| 国产精品鲁鲁鲁| 久久国产精品| 成人欧美一区二区三区白人| 国偷自产av一区二区三区| 小说色| 你懂的国产| 欧美1级| 亚洲www啪成人一区二区麻豆| 佛山市|