施肥對荒漠草原土壤呼吸和溫室氣體通量的影響.pdf_第1頁
已閱讀1頁,還剩47頁未讀, 繼續(xù)免費閱讀

下載本文檔

版權(quán)說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請進行舉報或認領(lǐng)

文檔簡介

1、分類號 S158.3 學校代碼 10129U D C 631.4 學 號 201320461施肥對荒漠草原土壤呼吸和溫室氣體通量的影響Effect of fertilization on Soil respiration rate and greenhousegases flux in the desert steppe申 請 人:楊朕軼學位類別:農(nóng)業(yè)推廣碩士領(lǐng) 域:農(nóng)業(yè)資源利用指導教師:紅梅 教授論文提交日期:二〇一五年六月Effec

2、t of fertilization on Soil respiration rate and greenhouse gases flux in the desert steppeAbstractIn breviflora desert grassland,with the LI-8100 carbon flux measuring instrumentand black box method ,To study soil respir

3、ation rate of the seasonal and interannualvariation,and the changes of greenhouse gas emissions in seasonal,and the relationshipbetween the impact factors in the different fertilization levels. Results are as follows:1.

4、The soil respiration rate(1) The soil respiration rate increased under the nitrogen application, Characteristicperformance for N10 > CK > N5 > N2.5;N, P, NP cells, NP Fertilizer significantlyincrease soil respiration rat

5、e, their relationship is that NP>P>CK>N10.(2) With the temperature increases, The soil respiration rate achieved a peak inmiddle of July and August, The rule of variation of soil respiration rate has’t comparedchanged wi

6、th no fertilization village, fertilization has not changed the variation of soilrespiration rate.(3) The soil respiration rate have a significantly relationship with soil temperature in5 cm and 0 ~ 10 cm,The main affecti

7、ng soil respiration are soil temperature and soilmoisture in desert steppe.2. Ecosystems greenhouse gas flux(1) In three different nitrogen gradient in the district,CH4 absorb flux relationship isCK>N2.5>N10>N5,CO2 emiss

8、ion flux relationship is N5>CK>N10>N2.5,N2Oemission flux relationship is CK>N5>N2.5>N10; N, P, NP within the district, CH4absorb flux relationship is P>CK>NP>N10,CO2 emission flux relationship is NP>P>CK>N10,N2O emission

9、 flux relationship is CK>NP>P>N10.(2) Compared with the fertilization district, fertilization does not change the rule ofthe greenhouse gas emission flux in the whole growing season;(3) Greenhouse gas flux have a signifi

10、cantly correlation the soil of 5 cm groundtemperature and soil water content. The main affecting greenhouse gases flux are soiltemperature and soil moisture in desert steppe.Keywords Keywords: Desert grassland ;Soil resp

溫馨提示

  • 1. 本站所有資源如無特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁內(nèi)容里面會有圖紙預覽,若沒有圖紙預覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 眾賞文庫僅提供信息存儲空間,僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護處理,對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對任何下載內(nèi)容負責。
  • 6. 下載文件中如有侵權(quán)或不適當內(nèi)容,請與我們聯(lián)系,我們立即糾正。
  • 7. 本站不保證下載資源的準確性、安全性和完整性, 同時也不承擔用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

評論

0/150

提交評論