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second growth 【植物;植物學】次生林。

second international

The study was primarily conducted to investigate the effects of various irrigation managements on the yield , quality and wue of alfalfa and the sustainable utilization of soil - water in north china plain . five treatments were applied : 0mm , 30mm , 50mm , 75mm and 100mm irrigating at the beginning of the second growth cycle in 2001 本研究通過兩年的灌溉實驗,根據對降水情況、土壤水分的蒸發量、蒸散量與苜蓿各生物學指標的分析,初步探討了在華北平原地區不同灌溉處理對于苜蓿產量、品質、水分利用率以及苜蓿地土壤水資源利用可持續性的關系。

For the ceramic materials , the effects of additives such as pbo , b2o3 , co2o3 , mno2 , cr2o3 , sb2o3 on the electrical properties of bismuth - free zno - glass varistor were studied . the glass phase formed mainly by pbo and b2o3 during sintering process could decrease the sintering temperature , improve grain uniform growth and inhibit grain second growth . nonlinear property could be improved by properly adding co2o3 , mno2 , and cr2o3 對瓷料而言,系統研究了非bi系zno -玻璃料配方體系中pbo 、 b2o3 、 co2o3 、 mno2 、 cr2o3 、 sb2o3等添加劑對壓敏電阻電性能的影響規律,其中, pbo 、 b2o3在燒結過程中形成的玻璃相,可降低燒結溫度,促進晶粒均勻生長,抑制晶粒二次長大, co2o3 、 mno2 、 cr2o3做為非線性添加劑,適量添加可提高樣品的非線性, sb2o3做為改性添加劑,在燒結過程形成的尖晶石相可細化晶粒,抑制晶粒二次生長,改善樣品的綜合電性能。

The bell - shaped time course of the information entropy indicates that a forward mutation of “ - resistant “ hosts takes place , since no loss of cellular viability occurs for the second growth phase of reinduced ( i . e . recovered ) cells 從誘導過程之鐘形訊息亂度之時間趨勢表示正向反應變異為-阻抗能力之宿主菌確實已發生,因為再誘導菌相細胞之第二生長期并未發生因感染而失去細胞存活之現象。

The abundant degree of plants , seed seedling amount , and the diversified index in the seed bank of the urban green land are lower than the natural second growth forest in outer suburbs 城市綠地土壤種子庫中種的豐富度、種子苗量、多樣性指數均不如遠郊區山地天然次生林。

Physiognomy classifies forests based on their overall physical structure or developmental stage ( e . g . old growth vs . second growth ) 地貌樣式林根據它們整體物質結構或發展階段(例如原生和次生) 。

Probe into the effective paths and methods for transforming the low - efficiency second growth 低效次生林改造的有效途徑和方法探討

It ' s the most well preserved river valley second growth forest in asia 它是亞洲保存最完整的河谷次生林。

The ground was low and covered with a second growth of grey-green willows . 地勢很低洼,長滿了人工種下的灰綠色的柳樹。