During the day water loss by transpiration exceeds water absorption by the roots and leaf water potential decline.
白天蒸腾作用散失的水分超过根系吸收的水分，因而叶子的水势就下降。
Under the same soil drought status, leaf water potential under high nitrogen level was lower than that under low nitrogen level.
在相同干旱胁迫下，低氮处理的叶水势高于高氮处理的叶水势。
When soil moisture contents were above 9.5%, there was no apparent change in leaf water potential with a drop in soil moisture contents.
当土壤含水量在9.5％以上时，随土壤含水量的下降叶水势变化不明显。
It was shown by the experiment carried out in the sprinkling irrigation area that change in leaf water potential was obvious at 14:00 everyday;
在喷灌区一季冬小麦的试验表明，冬小麦叶水势值在各生育期每天的14：00左右发生明显变化；
The relationships between soil water potential and leaf water potential, and those between leaf water potential and photosynthesis were studied.
同时也分析了土水势和叶水势的关系，叶水势与光合作用的关系等。
Under sprinkling irrigation, when the irrigation rate exceeded 150mm after the wheat returned green, its effect on leaf water potential decreased.
喷灌条件下，当返青后灌水量超过150mm时，灌水量对叶水势的影响减小。
The above inclusions show that the plant water stress is due to the lack of water, Thereis obvious negative correlation between CWSI and leaf water potential.
这些表明CWSI较好的反映了因土壤供水不足导致的作物水分胁迫，CWSI与叶水势之间呈明显的负相关关系。
The analysis of variance shows a significant effect on the interaction of heat stress and growing media on leaf water potential when the treatment is applied only at midday.
分析表明中午期间热应激和栽培基质的相互作用对叶面水势有显著影响。
According to the experiments conducted in natural pastures in Maowusu Sandland, the factors that influence the leaf water potential of natural grass are studied in this paper.
以毛乌素沙地天然牧草为研究对象，采用田间试验对天然牧草叶水势的影响因素进行了研究。
It was revealed that significant differences in leaf water potential, stomatal resistance, transpiration rate, and rate of water loss of excised-leaves existed among genotypes.
研究表明，叶水势、气孔阻力、蒸腾强度和离体叶片失水速率品种间均存在明显差异。
Relative air humidity is the dominant factor for field pea to affect daily dynamics of leaf water potential, followed by air water potential, soil water suction , air temperature and solar radiation.
影响豌豆叶水势日变化因子中最重要的是大气相对湿度，其次是大气水势、土壤水吸力、大气温度和太阳辐射。
Leaf water potential and transpiration velocity of plant is two important physiologic index that reflect water regime of plant.
植物叶水势和蒸腾速率是反映植物水分状况的两个重要生理指标。
Leaf water potential and transpiration velocity of plant is two important physiologic index that reflect water regime of plant.
植物叶水势和蒸腾速率是反映植物水分状况的两个重要生理指标。
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