2) gray desert cotton soil
灰漠土棉田
1.
By the field and the pot test, we studied the effect of using humic acid on phosphorus available, the inorganic phosphorus various components, soil pH, CaCO_3 content influence as well as various ingredients mutual influence in the typical gray desert cotton soil, and discussed the effective way of using humic acid activate soil phosphorus.
我们通过大田及盆栽试验,研究了典型灰漠土棉田上施用腐植酸对土壤有效磷、无机磷各组分、土壤pH、CaCO_3含量的影响以及各成份之间的相互影响,探讨腐植酸活化土壤磷的有效途径。
3) desert grey soil
灰漠土土壤
1.
The effects of "NSI-415" aquasorb on physical and chemical properties of plantation site of desert grey soil at gravel gobi in Junggar Basin were studied.
研究结果表明:穴状施用"NSI-415"保水剂对砾质戈壁灰漠土土壤的含水率,pH值、有机质和总盐含量,容重,结构组成均无显著影响。
4) cotton field soil
棉田土壤
1.
With Bt-transgenic cotton 33B as experimental plant and Dicyanodiamide(DCD) as nitrification inhibitor,the effects of nitrogenous fertilizer strategies(including DCD and non-DCD treatment in different nitrogen levels) on the nitrogen accumulation in cotton field soil and cotton functional leaves were discussed.
通过在棉田中施用硝化抑制剂双氰胺(DCD)实现棉花增铵营养的途径,来改变传统棉田氮肥运筹途径和营养状况,同时考察了由此导致的棉田土壤和棉株功能叶片中氮素变化动态。
5) desert soil
沙漠土壤
1.
Analyzing the characteristics of desert soil, the paper introduces several key technologies influen- cing desert soil compaction,such as water content control,equipments and its parameters,analyzes the difficulty of roller and self-unloaded truck across the desert soil.
在分析沙漠土壤特殊性质的基础上,探讨了压实中沙土含水量的控制、压实设备的型式及其参数的选择对沙漠土壤压实质量的影响,分析了压路机和自卸车在沙漠土壤上行驶困难的原因。
6) desert soil
荒漠土壤
1.
Effects of land use on organic carbon and nutrient contents in desert soil;
土地利用方式对荒漠土壤有机碳和养分含量的影响
2.
To study the water–holding capacities of desert soil and the soil improved with coal ash and sewage sludge,experiments were designed to simulate rainfall and natural evaporation.
本文通过模拟降雨及降雨后自然条件下的土壤表面水分蒸发,研究了粉煤灰和城市污泥改良荒漠土壤对持水性能的影响。
3.
To study the water-holding capacities of desert soil and the soil amended with coal ash and sewage sludge, experiments were designed to simulate rainfall and natural evaporation.
通过模拟降雨及降雨后自然条件下的土壤表面水分蒸发,研究了粉煤灰和城市污泥配施对荒漠土壤持水性能的影响。
补充资料:粉煤灰改良土壤
粉煤灰改良土壤
fly ash in soil amelioration
fenme一hu一90}l一ong turong粉煤灰改良土坡(fly ash in 5011 ameliora-tion)粉煤灰是由多种颖粒组成的,包括:碳粒、球形颗粒、蜂窝状顺粒、石英等.粉煤灰中粒径大于。.01 mm的物理性砂粒占85%左右,毛细管孔隙度为“%~85%,视密度为2.。~2.29/cm,,容积密度为。.609/cm,。因此,粉煤灰具有质轻、多砂、多孔、渗透快、吸水性及保温性好、吸附性高等特性。同时,粉煤灰中含有植物所需的多种化学营养元素,因此是一种多功效的土壤改良剂。 扮性土城改良各种猫性土壤都质地猫重、通气透气不良、耕性差,水、肥、气、热不协调,因而影响作物生长。利用粉煤灰的物理特性,适量施人粉煤灰(2 .25~4.5 kg/m,),可以明显地改良土壤质地。主要是:①降低翁土中猫粒相对含量,改良质地;②减小土壤容重.③增加土壤孔隙度,④提高猫土15 cm土层内的温度;⑤提高土坡含水量和田间持水量;⑥调节土壤三相比(固相:液相:气相);⑦减小土镶膨胀率.提高土壤渗透性,防止土坡流失。粉煤灰对猫性土壤物理性质的显著改善.促进了土壤中徽生物活性,有利于养分转化和保温保墒,使水、肥、气、热走向协调,为作物生长创造良好的土壤环境.同时,粉煤灰中含有的硅、铜、锌、钥、钙、铁、锰、翻、硒等营养微量元素,增加了土壤中这些营养元素的含量,改善了土壤养分状况;施用粉煤灰,还可提高土壤中有效磷含量。实践证明,施用适量粉煤灰对小麦、玉米、水稻、大豆等主要作物皆有显著的增产效果,其中小麦平均增产12.7士5.8%,玉米平均增产20.8士10%。另外,对谷子、甘薯、棉花、蔬菜等作物也有一定的增产效果。同时,施用粉煤灰后长出的粮食中蛋白质含量有所增加。 酸性土壤改良对于酸性猫质土壤,除有上述改良作用外,粉煤灰还可以提高土坡中的pH值,使酸性土壤中性化,有利于作物的生长。 盐化潮土的改良向盐化翁性潮土施用粉煤灰,既可改良潮土的翁性,又可起到降盐作用。 在有效硅较低的土壤中,粉煤灰与腐殖酸结合使用,可以提高土壤中有效硅含量,从而改善作物的生长条件。 粉煤灰中含有一定量的有害元素,如锅、铬、铅、砷、汞、苯并(a)花、放射性元素等,经过大量的研究和实践,在施粉煤灰量4.5 kg/mZ以下时,不会对土壤产生污染.对这些土壤中生长的粮食作物也不会造成污染。但由于煤种的不同,粉煤灰中有害元素含量也各有差别,故在施用粉煤灰时应做试验.
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条