室内试验表明：其除草效果与土壤有机质、土壤持水量密切相关。
The greenhouse tests also show that its efficacy is concerned with the organic matter and humidity in soil.
喀斯特环境有成土过程缓慢、土层浅薄、土被不连续、土壤持水量低、植被覆盖率低的特点。
The karst region is very fragile eco-environment with slow soil formation process, shallow and discontinuous soil, small water holding capacity, and low vegetation coverage.
而当降水强度较大，以致使土壤水分大于田间持水量时，超过田间持水量部分的土壤水会很快流往较低的台阶。
However, when precipitation rate is large enough and soil water goes beyond the field capacity, the excessive soil water will flow laterally to the lower levels through noncapillary pores.
当过量的水从饱和土壤中排出后，余下的水量被称为田间持水量。
The amount of water that remains after the excess has drained away from the saturated soil is known as the field capacity.
结合不同处理下嘎拉幼苗生长特征可知，嘎拉幼苗良好生长的土壤水分条件应不低于田间持水量的60%。
After analyzing the growth characteristics of the seedling, it is found that the seedlings enjoyed growing under conditions of water content of soil was not lower than 60% of field capacity.
改良后的土壤毛管持水量、含水量明显增加。
The capillary water and the moisture of amended soil significantly increased.
在天目山地区，森林土壤的持水量较非林地土壤（荒草地）为高；
The deciduous broad-leaf forest always holds more water in the soil than the evergreen needle forest does.
实验结果表明，细粒土壤下垫有粗粒土壤时，上部细粒土壤的持水能力有明显的提高，可以超过最小持水量而得到若干补充水量。
Experimental results show that fine texture soil layer overlying coarse texture soil layer can markedly increase water-holding capacity and get some supplement of water after reaching field capacity.
从土壤入渗功能、枯枝落叶层最大持水量以及土壤贮水能力等方面进行研究，探讨不同植被类型对土壤的改良效果。
At last in order to analyze the improved effect on soil, the staggered research was discussed in the following aspects: infiltration capacity of soil, water holding capacity for soil and litter layer.
四种改良剂均能不同程度的改善土壤物理性状，能降低土壤容重，提高土壤总孔隙度，加快渗透速度，增加田间持水量。
Four kinds of amendments can improve soil physical properties. Soil bulk density decreased, soil porosity, permeability coefficient and field capacity increased under treatments.
但重度水分胁迫（土壤含水量为田间持水量的35％）抑制根系的生长，根系活力下降；
The growth of root was restrained and activity of root decreased under severe water stress ( water content of soil is 35% the content of field holding water).
蛋白质含量最低值和产量最高值之间对应的施氮量为产量和 蛋白质含量在土壤水分含量为田间最大持水量的50%和60%条件下协同变化的施氮量区间。
The nitrogen between minimum protein content and maximum yield were the nitrogen of coordinated variation of yield and grain protein content in 50% or 60% of soil water content.
土壤含水量达最大田间持水量的5 2 %以上时，才有较大的生物量；
When water content in soil is above 52%, larger biomass could occur.
适度的水分胁迫（土壤含水量为田间持水量的60％）对苗期小麦根系生长有一定的促进作用，可使根冠比增加，根系活力增大；
The growth of root was promoted, and increased in root top ratio value and activity of root under moderate water stress (water content of soil is 60% the content of field holding water).
对于相同母质发育的红壤，在低吸力阶段，轻度侵蚀、中度侵蚀、重度侵蚀土壤的持水量相差不大；
In the lower soil suction range , The water-supply capacity of red soil derived from Q2 was higher than that derived from granite while In the higher soil suction range the different was not widely.
凋萎湿度、田间持水量、整个根区初始土壤有效含水量对土壤水分影响为正效应；
The effects of wilting point, field capacity and initial amount of available soil moisture in root zone on soil moisture were positive.
说明光合作用对土壤水分存在一个“阈值”反应，此值为土壤田间持水量的6 5%左右。
This indicates that photosynthetic rate has the threshold response to soil moisture and the threshold value is about 65% of field capacity.
在饱和持水量的条件下，草地雀麦具有加速土壤水分散失的作用。
When the soil moisture is saturated, Bromus riparius can accelerate the loss of soil moisture .
覆草后土壤的物理性状也得到改善，土壤容重降低、田间持水量和孔隙度提高。
The physical character of soil was also improved after covering straw. The soil bulk density was reduced. Field moisture capacity and porosity percentage were increased.
覆草后土壤的物理性状也得到改善，土壤容重降低、田间持水量和孔隙度提高。
The physical character of soil was also improved after covering straw. The soil bulk density was reduced. Field moisture capacity and porosity percentage were increased.
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