本文選題：溫室氣體排放　切入點：氨揮發(fā)　出處：《內(nèi)蒙古農(nóng)業(yè)大學(xué)》2017年碩士論文

【摘要】：研究農(nóng)田土壤溫室氣體排放和氨揮發(fā)對提高肥料利用率和減緩環(huán)境壓力具有重要意義。本研究通過不同尿素用量及處理措施的滴灌馬鈴薯田的溫室氣體排放和氨揮發(fā)特征,為內(nèi)蒙古陰山北麓馬鈴薯種植的合理施肥提供科學(xué)依據(jù)。本研究主要結(jié)果如下:1.馬鈴薯田溫室氣體排放CO2累積排放量為5840.10～20231.33 kg/hm2。相較于不施肥的處理,施肥的處理顯著增加了 CO2累積排放量。CH4累積吸收量為0.21～0.54kg/hm2,且均為不施肥處理最高,施肥量對CH4的影響并不顯著。施入肥料的后第3天N2O排放量達到峰值,N2O累積排放量為0.64～3.52 kg/hm2,過量施肥會顯著增加N2O累積排放量;剖面溫室氣體不同土層的氣體濃度表現(xiàn)出不同的差異性:隨著土層深度的增加,CO2和N2O濃度隨之增加,CH4濃度則隨之減少;同一土層不同處理溫室氣體濃度基本特征是:過量施肥會使CO2、CH4和N2O濃度顯著高于其他處理;過量施肥會顯著增加馬鈴薯的全球增溫強勢(GWP)和溫室強度(GHGI),但馬鈴薯產(chǎn)量相較并沒有顯著提高。添加脲酶抑制劑處理可以降低全球增溫潛勢(GWP)和溫室強度(GHGI),但未達到顯著水平。2.馬鈴薯田氨揮發(fā)在施入肥料后的第1～5 d氨揮發(fā)速率出現(xiàn)峰值,隨著施肥量的增加氨揮發(fā)損失率也呈增加趨勢,氨揮發(fā)累積量為1.87～5.21.kg N/hm2,凈損失率為0.21%～1.02%;過量施肥會顯著增加氨揮發(fā)量。添加脲酶抑制劑可以減少氨揮發(fā)量,但未達到顯著水平。通過在滴灌馬鈴薯田的試驗結(jié)果表明,過量的施氮顯著增加了氨揮發(fā)和溫室氣體排放量。對施氮量以優(yōu)化和控制可以在不影響產(chǎn)量前提下減少溫室效應(yīng)和氨揮發(fā)損失。添加脲酶抑制劑可以降低氨揮發(fā)量和溫室氣體排放排放量,但未達到顯著水平;土壤濕度和土壤溫度在一定程度上影響著溫室氣體排放量和氨揮發(fā)量。
[Abstract]:It is important to study greenhouse gas emission and ammonia volatilization of farmland soil for increasing fertilizer utilization efficiency and reducing environmental pressure. The greenhouse gas emission and ammonia volatilization characteristics of potato field under drip irrigation with different urea dosage and treatment measures were studied in this paper. The main results of this study are as follows: 1. The accumulative CO2 emission of greenhouse gas emission from potato field is 5840.10 ~ 20231.33 kg 路hm ~ (2) 路hm ~ (2). The cumulative emission of CO2. CH4 was 0.21 ~ 0. 54 kg 路hm ~ (2) and the highest was in the treatment of no fertilization. The effect of fertilization on CH4 was not significant. On the 3rd day after fertilization, the cumulative emission of N2O reached a peak value of 0.64 ~ 3.52 kg 路hm ~ (2), and excessive fertilization increased the cumulative emission of N _ 2O significantly. The concentration of greenhouse gas in different soil layers showed different differences: with the increase of soil depth, the concentration of CO _ 2 and N _ 2O increased and the concentration of Ch _ 4 decreased; The basic characteristics of greenhouse gas concentration in different treatments in the same soil layer were as follows: the concentration of CO _ 2C _ 4 and N _ 2O was significantly higher than that of other treatments when excessive fertilization was applied; Excessive fertilization could significantly increase the global warming and greenhouse intensity of potato, but the yield of potato was not significantly increased. The addition of urease inhibitor could reduce the global warming potential and greenhouse intensity of GHGI, but did not increase the yield of potato. The ammonia volatilization rate of potato field reached the peak at the 5th day after applying fertilizer. The ammonia volatilization loss rate also increased with the increase of fertilization amount. The ammonia volatilization accumulated amount was 1.87~5.21.kg N / hm _ 2, and the net loss rate was 0.21 ~ 1.02%. Excessive fertilization increased ammonia volatilization significantly. Adding urease inhibitor could reduce ammonia volatilization. But not at the significant level. The results of the experiment in drip irrigated potato fields show that, Excessive nitrogen application significantly increased ammonia volatilization and greenhouse gas emissions. Optimization and control of nitrogen application amount can reduce the loss of Greenhouse Effect and ammonia volatilization without affecting yield. Adding urease inhibitor can reduce ammonia volatilization. Volume and greenhouse gas emissions, Soil moisture and soil temperature affect greenhouse gas emissions and ammonia volatilization to some extent.
【學(xué)位授予單位】：內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S532

【參考文獻】

相關(guān)期刊論文 前10條

1 張，

本文編號：1683232