|
论文大纲，目录 |
| 关键词搜索：农作物论文 学术论文 |
堆肥Composter
氮Nitrogen
碳Carbon
氮碳比C/N ratio
孵育Incubation
堆肥化Composting
【论文类别】 博士论文
【中文摘要】
将未经堆积处理畜产废弃物施用于蔬菜和果树，不但容易造成环境卫生问题，另外在其分
解过程中产生有机酸和消耗大量氧气，而造成作物根部的受伤。将有机废弃物经过适当的
堆肥化处理，制成高品质有机质肥料回馈农田，不仅可以提升农田地利，且减少废弃物对
环境的冲击。本实验的设计为以尿素和豌豆苗头作为氮源来制作稻秆堆肥（S）及豌豆苗头
堆肥（P），将稻秆堆肥及豌豆苗头堆肥的碳氮比分别用尿素及豌豆苗头调成 30、 20和
10并作三重复，进行63天堆肥化，堆肥化过程中温度、pH值、水分含量、灰分、总碳、总
氮、可溶性氮等变化来探讨堆肥的堆肥化过程的性状。在堆肥化21（A）、42（B）、63（C
）天将不同处理的三重复收集，并利用 Neubauer 堆肥生物有效性试验及盆栽试验来瞭解
堆肥的肥效。
研究结果显示，豌豆苗头堆肥有较易利用的碳原、氮源，堆肥化上速率均大于碳源较不易
分解的稻秆堆肥，所以豌豆苗头堆肥可在短期间完成堆肥化的进行，稻秆堆肥则需较长的
堆肥化时间。堆肥化的程度及速率可由温度变化、总氮的增加、有机物质的减少、碳氮比
的降低等趋势的变化来得知。
添加过多的尿素对堆肥来说无法完全提供给微生物利用，尿素转化为氨气挥发至大气，造
成氮源的浪费。过高的氨浓度会使微生物氨中毒，并抑制微生物的繁殖，也延缓了堆肥化
的时间，增加堆肥的成本。添加很多尿素的氮 S 10以及 P 10在堆积一开始氮的损失最为
明显。由此推知，用不同材料制造堆肥时，添加尿素的量方法及时机须做进一步研究。施
用堆肥在平镇系红壤中有较少的可溶性态氮，最高Neubauer生物有效性氮的吸收是在铵态
氮浓度最高时，并非是在可溶性态氮最高。而在七块厝系土壤中， Neubauer生物有效性氮
吸收与平镇系红壤不尽相同，最高的Neubauer生物有效性氮吸收不一定发生在铵态氮浓度
最高时，并且发生抑制有效性氮吸收的现象。在盆栽试验中，平镇系红壤施用稻秆堆肥中
S 30 以 S 30B以及豌豆苗头堆肥中的 P 30B 及 P 10B的产量最高， S 20B 的产量低于化
学肥料以及无施用肥料。七块厝系土壤产量较红壤低，而S 30、S 20 以及 P 30的产量也
都小于无施肥的处理，表示施用这些堆肥在七块厝系土壤造成作物生长抑制。
【英文摘要】
Using directly farm waste or animal manure without composting on vegetable
corp or on fruit trees would cause insanitary impact on environment. The
farm
waste can produce organic acids and deplete much oxygen that would hurt
the
plant root physiology. If farm waste could be composted adequately to
become
high quality organic fertilizer and then applied to the farm, it would not
only 无忧论文 【http://www.uklunwen.com】increase the corp yield, but also reduce the unfavorable to the
environment. We have used straw and pea seedling residues as composting
material by adding urea as nitrogen source, C/N ratio adjusted for both
straw
and pea series t have initial value of 30, 20 and 10. Three replicates of
each
plot, were composted for 21 (A), 42 (B) and 63 (C) days. The changes of temperature, pH, water content, ash content, total nitrogen concentration,
soluble nitrogen concentration, total carbon concentration during
composting
period have been determined for understanding the characteristics of
composting process. The fertilizer characteristics were evaluated by using
a
modified Neubauer test and a pot culture with mustard plant.
Results have shown that pea seedling residue as raw material composted
more
easily than rice straw. The reaction rate of pea residue was faster than
论文稻秆和豌豆苗头制成的堆肥与其肥料性状来自www.66wen.com免费论文网
rice
straw, so that pea residue composting has appoached completion in rather
shoter time, and much longer in rice straw plot. The changes of
temperature,
increase of total nitrogen content, decrease of organic carbon content and
decrease of C/N ratio are evidence for characteristing the composting
process.
Too much nitrogen addition to the composting materials has caused ammonia
loss
and toxicity. High ammonia partial pressure has harmed the growth,
especially
in S 10 and P 10 plot. The application of compost to the |
|
|
第1页 第2页 第3页 |
|
|
| 上一篇：南京景观设计的得与失下一篇：美国农业政策对我国农业发展的启示
|
| 最新论文 |
最热门论文 |
|
|
|
|
|
