毕业论文移动版

中文摘要：随着人口的增长，土地可利用面积大量减少，大面积围垦滩涂盐碱地成为我国滨海地区重要的后备土地资源，但目前部分滩涂地区盐碱化严重，寸草不生、长年荒芜，是围垦滩涂植被重建的最大障碍。本次课题即结合上海市科委天文台项目，探究在实验条件下，腐殖质不同施用量对已经过脱硫石膏处理的上海南汇滩涂盐碱土的改良情况。结果表明，在脱硫石膏处理过的盐碱土中施加一定质量分数的腐殖质可以降低滩涂土壤盐碱性、改善土壤营养成分以及促进植物生长。与两个空白（1。原土2。脱硫石膏处理盐碱土）处理相比，腐殖质施用量为25g/kg时，土壤pH分别降低23。2%和13。8%，EC值分别升高39。2%和降低12。10%，有机质含量分别提高63。2%和71。2%；水解性氮分别提高23。3%和65。1%；有效磷分别提高49。4%和64。6%；速效钾分别提高40。3%和62。9%。随腐殖质施用量增加，黑麦植株的发芽率分别提高84%和68。1%；高度分别增加24。7%和14。7%；植株鲜重分别增加60。6%和48。5%，干重分别增加45。1%和37。7%；植株地上长度相对于两组对照分别增加47。2%和39。8%；地下长度相对于两组对照分别增加50。7%和41。4%；叶片数分别增加36。4%和31。8%；总氮含量分别增加58。3%和45。5%；总磷含量分别降低10。3%和46。9%；总钾含量分别增加29%和23%。因此，本实验中质量分数20%为改良滨海滩涂盐碱土及促进植物生长适宜和安全的腐殖质施用量。81094

毕业论文关键词：腐殖质；烟气脱硫石膏；滩涂盐碱土；植物生长发育

The Effect Of Humus On Saline Alkali Soil Of flue gas desulfurization Gypsum

Abstract: With the growth of population, land use area can be greatly reduced, a large area of saline land reclamation has become an important reserve land resources in coastal areas of China, but the saline beach area part of serious, barren, barren years, is the biggest obstacle to reclamation vegetation reconstruction。 This topic is combined with the Shanghai science and technology Observatory project to explore the improvement of saline alkali soil in Shanghai Nanhui tidal flat under the experimental conditions。 The results showed that applying a certain amount of humus in the treated saline soil could reduce soil salinity, improve soil nutrients and promote plant growth。 With two blank (1。 of the original 2。 soil gypsum treatment of saline alkali soil) compared to humus application amount was 25g/kg, soil pH decreased by 23。2% and 13。8%, EC values were increased by 39。2% and decreased 12。10%, the content of organic matter increased by 63。2% and 71。2% respectively; the hydrolysis of nitrogen were increased by 23。3% and 65。1% respectively; available phosphorus increased 49。4% and 64。6%; K were increased by 40。3% and 62。9%。 With humus increased, rye plant germination rate increased 84% and 68。1% respectively; the height increased 24。7% and 14。7%; plant fresh weight was increased by 60。6% and 48。5%, the dry weight was increased by 45。1% and 37。7%; shoot length relative to the two group were increased by 47。2% and 39。8%; the underground length relative to two groups were increased by 50。7% and 41。4%; number of leaves were increased by 36。4% and 31。8%; the total nitrogen content increased by 58。3% and 45。5% respectively; the total phosphorus content decreased by 10。3% and 46。9% respectively; the total potassium content increased 29% and 23% respectively。 Therefore, in this experiment, the quality fraction of 20% is to improve the coastal beach saline alkali soil and to promote the plant growth suitable and safe humus dosage。 

Key Words：Humus; Flue Gas Desulfurization Gypsum;saline-sodic of tidal flats;plant growth

目  录

1绪论

1。1腐殖质概述。4

1。2腐殖质与枯枝落叶的互充互补。4 (责任编辑：qin)