Soil Phosphorus Distribution as Affected by Irrigation Methods in Plastic Film House

来源 :Pedosphere | 被引量 : 0次 | 上传用户:liupingxiu
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Water-saving irrigation methods have been increasingly used for vegetable cultivation in greenhouse or plastic film house.However,there is limited information concerning the effect of water-saving irrigation methods on soil phosphorus (P)behavior.In this experiment,drip and subsurface irrigation methods were applied,with furrow irrigation method as control,in Mollic Gleysols.Soil P distribution throughout the depth was significantly affected by irrigation methods.Total, Olsen,organic and inorganic P contents were greater in the topsoil(0–10 and 10–20 cm)than in the subsoil(20–30,30–40, 40–50 and 50–60 cm).The Olsen P content throughout 0–60 cm layer under drip and subsurface irrigation treatments was lower than that under the furrow irrigation treatment.However,the total,organic and inorganic P contents from 20 to 60 cm under drip irrigation treatment were higher than or close to those under furrow irrigation treatment,but were lower under subsurface irrigation treatment than under furrow irrigation treatment.Under subsurface irrigation treatment,the contents of total,organic and inorganic P at the 0–10 cm layer were 78.0%,1.3% and 3.7% greater than those at the 10–20 cm layer,respectively.But Olsen P content at the 10–20 cm layer was 5.7% larger than that at the 0–10 cm layer.These suggested that soil P behavior could be manipulated by soil water management to some extent. Water-saving irrigation methods have been increasingly used for vegetable cultivation in greenhouse or plastic film house. However, there is limited information concerning the effect of water-saving irrigation methods on soil phosphorus (P) behavior. In this experiment, drip and subsurface irrigation methods were applied, with furrow irrigation method as control, in Mollic Gleysols. Orp P distribution throughout the depth was significantly affected by irrigation methods. Total, Olsen, organic and inorganic P contents were greater in the topsoil (0-10 and 10-20 cm) than in the subsoil (20-30, 30-40, 40-50 and 50-60 cm). Olsen P content throughout 0-60 cm layer under drip and subsurface irrigation treatments was lower than that under the furrow irrigation treatment . The resulting, organic and inorganic P contents from 20 to 60 cm under drip irrigation treatment were higher than or close to those under furrow irrigation treatment, but were lower under subsurface irrigation treatment than under furrow irrigation treatment. Under subsurface irrigation treatment, the contents of organic, organic and inorganic P at the 0-10 cm layer were 78.0%, 1.3% and 3.7% greater than those at the 10-20 cm layer, respectively. But Olsen P content at the 10-20 cm layer was 5.7% larger than that at the 0-10 cm layer. These suggested that soil P behavior could be manipulated by soil water management to some extent.
其他文献
贫穷,影响的不只是物质生活,同时也会影响到人的心灵。  在这篇文章中我们便可以清楚地看到,贫困对小菲这位农村女孩的精神伤害。小菲是个聪明且富于文学才华的农村女孩,贫苦而封闭的农村生活造就了她的敏感和要强,然而也形成了她某种程度上的偏执和狭隘,使她习惯于在一个封闭的精神世界中寻求自我保护。正因为如此,当她突然面对相对优裕和开放的城市生活时,便产生了强烈的心理落差和一种本能的抵触。与新环境的格格不入使
将最后一批包裹装入邮局的运货车时,天已快黑了。看着邮车的红色尾灯渐去渐远,编辑们都松了一口气。和全国中语会联办的“苏教杯·我最喜欢的一篇语文课文”征文活动,是今年
美国宇航员查尔斯·杜克在一本书中描述了“阿波罗”16号登月的过程、他驾驶月球车的趣闻和在月球表面行走的感受。但最令我难忘的是他关于飞船燃料的介绍。杜克说他们那次在
凌濛初的文学思想受李贽的影响,“二拍”所展现的士人形形色色,贪欲享乐,贿赂枉法,乘人之危等充满了各种欲望;但凌濛初又是一个传统的士人,科举失利才著书泄愤。所以,他笔下
平民化的战争研究是否可能?战争研究是否可以超越民族/国家继而进入到“个人”的日常生活?答案通常是两个极端,正如今天的战争研究表现出的实际状况:一种局限在军事学中,近于客观的自然科学,面对过往战争,无论是非对错,也无论民族国家,都可以放在沙盘上用作教材。这种研究集中在军事院校和军事研究机构,它的对象是军队、武器、后勤以及战役、战术之类与“打仗”直接相关的人事——这其中的“人”就是军人,可以完全无涉平
逛市场,是我初到异地时最喜欢的活动。大型商场虽然很有趣味,但我更喜欢传统市集。喜欢的理由是,那里有时间的累积,有文化的痕迹,还可见人群的交换惯习。概括来说,就是具有人
《周易》本源意识强调了天人感合的生态构成,奠基于本源意识之上,《周易》产生形成的变易观、阴阳五行观、天人合用观对当代大学管理学有极大的启发价值。 The origin consc
苏轼难荆公有一次,东坡指着“坡”字请教王荆公(安石)字义。王安石解释道:“‘坡’乃‘土’之‘皮’。”东坡听了,反问道:“那么‘滑’乃‘水’之‘骨’喽?”安石闻之,半天默
老子提出做人要大气,做事要小细的处世原则,这对我们今天来说是很有用的。    大气做人    立身淳厚,抛弃虚华。老子首先提出了要大气做人。“大丈夫:处其厚,不居其薄;处其实,不居其华”。可以概括为:处厚不薄,处实不华,意为抱朴守拙。抱朴:保持自己纯真朴实的本性;守拙:坚守鲁直憨厚的本性。总之,做人要不世故,不圆滑。  “谦下”,学江海为“百谷之王”。老子认为,大气做人,就应该向“江海”学习。老子
近几年来,初中各年级的英语试卷中出现“按要求变换句型”的频率很高。而对“划线部分提问”是该类题型中的难题之一。为了使同学们掌握好该类题的答题技巧,在考试中取得更好