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本文分析了土壤溶液离子组成及八种离子的含量范围。从三个不同施肥量处理中说明土壤溶液浓度受旋肥量的影响很大,一般分布在表层,但各处理的阴、阳离子浓度对施肥的有无和多少没关系,经常保持在1:1。阴离子是支配土壤溶液浓度的关键,其中又以NO_3~-为主体。在火山性土壤、氧化土及老成土中,阴离子交换量(AEC)的作用大于阳离子交换量(CEC),并且是支配土壤溶液浓度的决定因素。在阴离子交换吸附中 SO~=_4为特异吸附,Cl~-为非特异吸附。引用了0×ford 的 Nye 学派摸拟 P 的扩散,其估算值和实测值基本符合,论证了 P 的主要供给方式是扩散。用各种浓度的 Ca(NO_3)_2处理土壤,得出了处理4的根圈土壤溶液浓度为最适浓度。即前期为11.5me/l,后期为9.3me/l,后期的贡献率显著提高。在80Cm 土层中设施 N100公斤/公顷和250公斤/公顷二个处理,每隔10Cm 埋入张力计和电导仪,来追踪 NO_3—N 的连续消长。考虑了水的上下移动量,得出该土层内消失的NO_3—N 量与玉来的吸 N 量大体相同或略多些,认为消失量略多是由于脱 N 现象引起的;并认为供给容量比强度因素的意义要大。
This paper analyzes the ion composition of soil solution and the content range of eight ions. The results of soil fertilization showed that the concentration of soil solution was greatly affected by the amount of rotary fertilizers and generally distributed on the surface. However, the concentration of anion and cation in each treatment did not matter to the amount of fertilizers or fertilizers, and was always maintained at 1: 1. Anion is the key to dominate the concentration of soil solution, which again NO_3 ~ - as the main body. In volcanic, oxidized and aged soils, the effect of anion exchange capacity (AEC) is greater than the cation exchange capacity (CEC) and is the determining factor that governs the soil solution concentration. In the anion exchange adsorption SO ~ = _4 for the specific adsorption, Cl ~ - non-specific adsorption. Reference 0 × ford the Nye school to simulate the proliferation of P, the estimated value and the measured values are basically consistent with the demonstration of the main supply of P is the proliferation. The soil was treated with Ca (NO_3) _2 at various concentrations, and the optimum concentration of rhizosphere soil solution of treatment 4 was obtained. That is, the previous period is 11.5me / l and the later period is 9.3me / l, the contribution rate of the latter period is significantly increased. N 80 kg / ha and 250 kg / ha were applied in the 80 cm soil layer. Tensiometers and conductivity meters were buried every 10 cm to track the continuous decline of NO 3 -N. Taking into account the water up and down the amount of movement, concluded that the disappearance of NO_3-N content in the soil and Jade to absorb N roughly the same amount or slightly more, that loss is slightly due to de-N phenomenon; and that the supply The significance of capacity is greater than the strength factor.