查询词典 infertile soil

Whole machine profile modeling of whole type floating profile modeling mechanism,side deep fertilizer opener of obtuse angle chisel shape,precision seed metering device of combined internal cell bore,and covering soil part of front back separating character are applied in the machine,...

该机采用整体式浮动仿形机构整机仿形，钝角凿形侧深施肥开沟器，组合内窝孔式精密排种器，前后分置式八字型覆土器，其原理新颖、传动可靠、使用调整方便，既可垄播、平播，又可按传统行距和大垄双行播种，播种质量好。

Then the rigorous solutions for soil layer vibration are analytically derived by virtue of the separation of variables.

进而根据桩土动力耦合作用，得到了饱和土中桩纵向振动频域解析解和时域响应半解析解。

The structures and characteristics of natural sepiolite and modified sepiolite are compared in this paper. The current situation of research and application in wastewater treatment, gases purification, soil remediation and so on are summarized.

从天然海泡石、改性海泡石的结构与性质的比较上，对改性海泡石在废水治理、气体净化、土壤修复等污染治理方面的研究进展进行了评述，并对其开发利用进行了分析和探讨。

As an important chemical analysis method, sequential extraction is the main link in analysis of heavy metals in soils, but adopting single extraction procedure for different types of soil and different forms of heavy metals makes it very difficult to compare the results.

连续提取法作为一种重要的化学分析方法，是土壤中重金属元素形态分析的主要环节，但同一种提取法对于不同的土壤类型及同类土壤中不同重金属形态的提取效果差异很大。

Elevated atmospheric CO2 levels may be altering the way that plants sequester organic carbon in soil, according to a study.

一项研究发现，升高的大气二氧化碳浓度可能改变植物截存土壤中的有机碳的方式。

Scientists in West Country, mainly in US and Canada, are seeking to sequester C in agricultural soil to offset their commitment to the Kyoto act.

以美国和加拿大为代表的发达国家正在热衷于研究农业土壤作为大气CO2 的"汇"。

The conversion of agricultural land and pasture to forest and many conservative agricultural practices can sequester atmospheric carbon in vegetation and soil.

农田和草地弃耕恢复为森林，以及农田保护性管理措施的利用。能够使大气中的碳在植被和土壤中得到汇集。

Soil organic carbon ; vegetation change ; impact factor ; C sequestrate

土壤有机碳；植被变化；影响因子；碳吸存

Today there are still large areas of paddy fields that have less soil organic C content than that at steady state. It is estimated that they could sequestrate on average 5150(±1063)kg hm^(-2) more of carbon.

目前仍有相当面积的水稻土其有机碳含量低于平衡水平，估计还可平均固碳5150(±1063)kg hm^(-2)。

Generically, forest restore is thought would sequestrate more atmosphere carbon, but carbon sequestration through aboveground biomass increasing may be offset by soil organic carbon loss.

一般认为，恢复森林可以增加碳汇，但在较为湿润的地区，灌木、树木入侵引起的地上生物量增加将被土壤有机碳的流失所抵消。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48