农田

The results indicated that the transfer and loss of N and P vary with means of rotation, types of crops and the amount of fertilizer application. Buffering forest belts betweens farmlands and ditches can effectively stop and purify such elements as N and P in soil runoffs, thus controlling non-point source pollution of agricultural lands.

结果表明：农田生态系统中 N、P等迁移、淋失状况随轮作方式、作物种类及施肥状况而变化；农田与沟渠间的缓冲林带具有截留和净化土壤径流中的N、P等物质的作用，从而在一定程度上控制农业非点源污染。

The CO2 effluxes from the soil showed exponential responses to the air temperature with significant correlative coefficient (from 0.84~0.87 under different straw management, irrigation and nitrogen application strategies).

为探讨不同农作措施条件下的农田碳平衡规律，研究农田对大气CO_2的源汇特征，2000年至2003年用钠石灰碱吸收法连续测定不同秸秆还田、灌溉和氮肥施用等农作措施下京郊冬小麦—夏玉米轮作体系作物生长季的土壤呼吸。

When fallowed, amount of nitrogen and phosphorus losses from FR decreased dramatically.

农田是流失氮素和磷素最多的利用方式；农田退耕可以显著地降低氮素和磷素的流失量。

Experiments is located at Yucheng Comprehensive Experimental Station, Chinese Academy of Sciences, Yuchen County, Shandong Province (Latitude: 36°57′N, Longitude: 116°36′E, and Altitude: 20m) in 2000～2001 and 2001～2002 winter wheat growing seasons. Mainly observed factors under sprinkler irrigation and surface irrigation conditions include (1) dry and wet bulb temperature and wind speed at four heights, radiation, soil temperature and water surface evaporation of 20cm standard pan on the top of canopy;(2) winter wheat tillering, stem height, leaf area, biomass and yield; and (3) soil water content and winter wheat evapotranspiration.

实验在中国科学院禹城综合试验站进行，主要观测内容包括：（1）喷灌和地面灌溉条件下近地面不同高度处的温度和湿度、辐射、地温和冠层顶部水面蒸发量等农田小气候要素；（2）叶面积、生物量和产量等作物生长要素；（3）土壤水分变化过程、农田蒸发过程和冬小麦耗水量等要素。

Firstly,establish the ecological environmental protect strip around the lake,efficiently deal with the farmland drainage.Using the pump station at the end of gutter pumps water to irrigate reed wetland.To practice man-made raising reedland.Using biology to clean up water to reduce salinity,nitrogen and phosphorus.To desalt the Beston Lake water.

首先要确立环湖生态环境保护带，使大部分农田排水得到有效处理，利用排水沟末端的扬排泵站抽取农田排出的水灌溉湖滨沼泽芦苇，实行人工育苇，利用生物净水作用减少入湖盐量和脱氮除磷，促进博斯腾湖水质淡化。

We analyzed and discussed the characteristics of cycle of carbon and water,and after having obtained important physiological parameters based on field experiment,a process-based, multilayer two-leaf model which calculates energy and material cycle separately for sunlit and shaded leaves was developed,then characteristic of CO_2 fluxes above the canopy was simulated.The main results are as follows:1.Characteristics of carbon and water cycle in the relationship of leaf photosynthesis -stomatal conductance-transpiration.

本研究以冬小麦为研究对象，利用LI-6400R光合—蒸腾测量系统、LI-6400-09土壤呼吸室和禹城生态试验站涡度相关系统等高精度仪器设备，对2007年和2008年小麦拔节至乳熟期间涉及碳、水循环过程的叶片光合—蒸腾作用、土壤呼吸作用及相关农田气象要素和植被特征进行了野外试验测定和分析，在试验观测基础上提取了重要生理参数，建立了基于过程的农田与大气间物质输送和能量交换的多层—双叶模型，并对2008年试验期间冠层上方碳通量特征进行了模拟，试验分析和模拟的主要结论如下：1。

The results showed that: planting two crops in a year under the condition of 640 mm annual mean rainfall in the Loess Plateau conduced to the substantial use of solar and water resources in summer fallow, the biomass yield, economical yield and water use efficiency was improved in different degrees, and the material cycle was enhanced.

结果显示：在黄土高原东南部年降雨量达640 mm左右的旱作农田，发展&一年二熟&种植能较好地利用夏闲期的水热资源，不同程度地提高了全年的生物产量、经济产量、水分利用效率，加强了农田物质循环。

To discuss the mechanism of controlling soil erosion by wind with standing crop stubble, combined the wind tunnel experiment with field experiment, the influence of soil erosion by wind on standing crop stubble under no-tillage practices was analyzed.

为了探讨直立作物残茬防治农田土壤风蚀发生的机理，该文利用风洞试验和野外观测相结合的方法，分析土壤免耕条件下直立作物残茬对农田土壤风蚀的影响。

Based on the second general soil survey in Corps, this papaer analyzes the change of the potassium in farmland soil and the potassium input in farmland soil during twenty years.

利用兵团第二次土壤普查以来的农田土壤钾素养分变化和20年来的农田钾素养分的投入状况的资料进行了综合统计分析。

In ecological fragile zone in arid and semi-arid area of Inner Mongolia, the ecological forest net works were constructed by afforestation in drought sun slope of Daqingshan mountain ,along highway and of shelter belt in farm land.

在内蒙古干旱、半干旱区生态脆弱带，通过对内蒙古大青山干旱阳坡、绿色通道和山前冲积、洪积平原农田防护林等三个类型森林生态网络体系的构建，遵循适地适树的原则，选择适宜树种、营养杯或带土托大苗，采用了保水抗旱造林技术措施，使得干旱阳坡造林成活率达到了 85～ 95%；绿色通道林造林成活率为 80 -1 0 0 %；农田防护林造林成活率为 90～99.8%。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失