An outlet pipe leads from the bottom of each lysimeter to overflow tanks 一條引出管由裝置底部伸到承接漏水的容器內。
The calculated value of bowen ratio was more accurate than the measured value of lysimeter in describing the evapotranspiration rule of crops in short period 波文比的計算值比蒸滲儀的測量值更能精確地反應短時段作物的蒸發蒸騰規律。
Based on the experimental data from cornfields , this paper compared the daily change of evapotranspiration calculated by bowen ratio energy balance and that calculated by lysimeter 摘要根據實測資料,對波文比計算的蒸發蒸騰量和蒸滲儀實測的蒸發蒸騰量日變化進行比較及分析。
The results showed that the evapotranspiration calculated by bowen ratio was highly related to solar radiation , but that calculated by lysimeter was not evidently related to solar radiation 結果表明,波文比所測蒸發蒸騰量與太陽凈輻射的相關性比較好,蒸滲儀所測值與太陽凈輻射的相關性不明顯。
Assuming that the moisture contents in the lysimeter at the time of measurement remain the same as the previous day , the difference between the added water and the overflow represents the potential evapotranspiration 假定蒸散量測定裝置內的含水量在兩次量度時間之間保持不變,則灑上草面水分和漏出水分之差即代表可能蒸散量。
Assuming that the moisture contents in the lysimeter at the time of measurement remain the same as the previous day , the difference between the added water and the overflow represents the potential evapotranspiration 假定蒸散量測定裝置內的含水量在兩次量度時間之間保持不變,則灑上草面水分和漏出水分之差即代表可能蒸散量。
An outlet pipe leads from the bottom of each lysimeter to overflow tanks . sufficient water is sprinkled on the grass every evening to ensure that a small overflow occurs in the outlet pipes before observation is taken the next morning 上面種滿短草。一條引出管由裝置底部伸到承接漏水的容器內。每日黃昏時草面都灑上足夠水分以使翌日早晨引出管有小量水分流出。
An outlet pipe leads from the bottom of each lysimeter to overflow tanks . sufficient water is sprinkled on the grass every evening to ensure that a small overflow occurs in the outlet pipes before observation is taken the next morning 上面種滿短草。一條引出管由裝置底部伸到承接漏水的容器內。每日黃昏時草面都灑上足夠水分以使翌日早晨引出管有小量水分流出。
The dynamic change of nh4 + , no3 - and tn , under the situation which urea was applied in the high fertility paddy - field in yuhang of hangzhou city with a lysimeter which was designed and made by ourselves , was studied and analyzed in order to find the rules of the change in the water - body of surface and the leakage rule of nitrogen , to reduce the effect of nitrogen loss on the water pollution 借助自行設計制作的稻田滲漏計,在杭州余杭對高肥力稻田不同施用尿素氮肥情況下,稻田地表水和滲漏水中銨態氮、硝態氮和總氮(簡稱三氮)的動態變化規律進行了研究分析,以利于發現氮素在地表水體變化和淋失規律,盡量減少氮素淋失對地下水體所造成的影響。
Using domestic strained integrated resistor as weighing sensor , at89c52 single chip as control unit , combined with arithmetical magnification , analogtodigital conversion ( a / d ) , real time clock , liquid crystal display ( lcd ) , and series communication interface , a minitype automatic weighing lysimeter is developed . that made measurement of evapotranspiration become conveniently and effectively in studying on water use of crops 為了方便、有效地測定植物的蒸散,為水分利用研究提供價廉物美、簡單易用的儀器,本研究利用國產的集成電阻應變式稱重傳感器,采用at89c52單片機作為控制單元,結合運算放大、模數轉換、實時時鐘、液晶顯示、數據存儲、串行通信等外圍接口電路,研制了小型自動稱重式蒸散儀。
百科解釋
A lysimeter is a measuring device which can be used to measure the amount of actual evapotranspiration which is released by plants, usually crops or trees. By recording the amount of precipitation that an area receives and the amount lost through the soil, the amount of water lost to evapotranspiration can be calculated.