摘要：为探明不同枯枝落叶堆肥施用量配合脱硫石膏对滨海盐碱土中的水解性氮、有效磷、速效钾组分等的影响，进行了盆栽试验，试验对象为上海南汇滩涂盐碱土，在已经过脱硫废石膏处理的基础上，施加不同质量分数的枯枝落叶堆肥（0，5%，10%，15%，20%）。试验结果表明，与对照组相比，枯枝落叶堆肥施用量为20%时，土壤pH降低24。6%，EC值升高40%，有机质含量提高187%；水解性氮提高34。2%；有效磷提高98%；速效钾提高61。6%。黑麦草的总氮含量增加158%；总磷含量降低5。2%；总钾含量增加32%，发芽率提高到87%；高度增加16%；叶片分蘖数增加35%。因此，脱硫石膏与枯枝落叶堆肥能够有效的改良盐碱地土壤，当脱硫石膏施用量为2。5g/kg时，枯枝落叶堆肥施加质量分数为20%效果最佳。80753

毕业论文关键词：盐碱地；枯枝落叶堆肥；脱硫石膏；盐碱土改良；植物生长

Study on the improvement effect of FGD gypsum and litter compost on saline alkali soil

Abstract：In order to find out the effects of different amounts of litter compost and FGD gypsum on hydrolyzable nitrogen, available phosphorus and available potassium in coastal saline alkali soil，carring out pot experiments。The experiment objects are saline alkali soil in Nanhui, Shanghai,on the basis of the treatment of FGD gypsum,applying litter composting with different mass fractions (0,5%, 10%, 15%, 20%) 。The test results showed that compared with the control group,when the amount of litter compost was 20%, soil pH decreased by 24。6%, EC value increased by 40%, organic matter content increased by 187%, hydrolysable nitrogen increased by 34。2%, available phosphorus increased by 98%, and available K increased by 61。6%。The total nitrogen content of ryegrass increased by 158%, total phosphorus content decreased by 5。2%, total potassium content increased by 32%,the germination rate increased to 87%, the height increased by 16%, and the number of tillers increased by 35%。Therefore, the FGD gypsum and litter compost can effectively improve the saline alkali soil,when the dosage of FGD gypsum was 2。5g/kg, the litter quality was 20%, the effect was the best。

Keywords: Saline alkali soil; Litter composting; FGD gypsum; Saline alkali soi ameliorate;Wheat;Plant growth。

目 录

1绪论 1

1。 1 概述 1 

1。1。1盐碱地概述 1

1。1。2脱硫石膏及枯枝落叶堆肥 1

1。2 脱硫废弃物在土壤改良中的研究概况 2

   1。2。1脱硫废弃物现状 2

   1。2。2脱硫石膏改良盐碱土研究概况 2

1。3 枯枝落叶堆肥改良盐碱地的现状及其特性研究 3

   1。3。1枯枝落叶堆肥现状 3

   1。3。2枯枝落叶堆肥对于盐碱地改良的研究 3

1。4 研究内容和目的 4

2。试验材料和方法 5

2。1 材料与仪器 5

   2。1。1实验材料 5

   2。1。2实验仪器 5

2。2试验设计 5

2。2。1试验方法 6

   2。2。2土壤理化性质测定 6

   2。2。3植物生长数据测定