心土

秸秆心土还田改良沼泽化土壤排涝效果的研究

Effect of Returning the Crop Stack into Subsoil on Improving The Marsh Bog Soil and Drainage

4类森林的土壤种子库储量在土层中的垂直分布为枯落物层>腐殖质层>心土层；

The seed reserves were highest in litter layer , followed by that in humus layer and subsurface soil layer .

本文研究了以甘蔗渣和树皮等，结合黄心土和珍珠岩作为桉树扦插的轻型基质。

Composted bagasse and pine bark were mixed with yellow soil and perlite to make up light medium for eucalyptus cuttings .

饱和-湿润段出现频率比例总体上底土>心土>表土，坡下>坡上；

The frequency of saturation - moist segment is ranked in the bottom soil > the subsoil > topsoil , down slope > up slope .

以浙江金衢盆地未开垦的荒地红壤为例，研究了红壤心土层在逐步风干脱水条件下的结构性变化情况。

In research for understand of the changes of soil structureness in subsoil layer during its weathering and dehydration processes , the uncultivated red soil has been sampled .

不同扦插基质其扦插生根率有显著差异，以黄心土和泥炭加珍珠岩为佳。穗条带顶芽或带1-2片叶可显著提高穗条生根率。

Rooting rate had remarkable variation in different cutting medium , the best medium was yellow soil and peat plus perlite , scions with bud or with 1-2 leaf .

先墙后拱开挖在隧道三种施工方式中围岩最大沉降位移最小，正台阶开挖方法围岩沉降位移最大，留核心土开挖方法介于二者中间。

And in three construction ways , the settling displacement of the surrounding rocks is smallest when using the excavation method with wall being first and arch being late ;

无除草剂残留的地块，土层置换改土处理的马铃薯产量低于其它两个改土处理，差异不显著，但马铃薯的大、中薯所占的比例高于心土耕、浅翻深松处理。

No herbicides residues soil , potato yield of soil replacement treatment was slightly lower , the difference was not significant , but the potato commodity rate was higher than the other two treatments . 8 .

以容积比为2∶1的炭化木糠+黄心土基质的平均每扦插杯干重和湿重都最轻，分别为40.9g和52.1g；

Both the dry weight and wet weight are the lightest while the medium is composed of carbonized saw dust and yellow soil in volume ratio 2 to 1 and they are 40.9 g and 52.1 g per container respectively .

且饱和、湿润段出现频率比例总体上是板栗园>花生地，底土>心土>表土，坡下>坡上、坡中；

On the whole , decreasing orders , like chestnut garden > peanut field , bottom soil > subsoil > surface soil , down-slope > upper slope and mid-slope , are observed in occurring frequency of the phases of saturation and wetness .

扦插平均生根率最高的为泥炭土+黄心土基质，生根率最低的为容积比1∶1的炭化栲胶渣+黄心土基质，分别为85.9%和6.7%；

The medium with peat and yellow soil has the highest mean rooting rate which is up to 85.9 % and the medium composed of carbonized tannin extract residual and yellow soil by the ratio of 1 to 1 has the lowest in 6.7 % .