2) Soil K status
土壤钾素状况
1.
Effects of long-term K fertilization on rice yield and soil K status in reddish paddy soil
长期施钾对红壤水稻土水稻产量及土壤钾素状况的影响
4) soil regime
土壤状况
1.
Study on soil regime and fertility culture ways about tea plantation of the red～yellow soil region in Hubei Province;
湖北红黄壤地区茶园土壤状况及培肥途径的研究
2.
The paper analyzed soil regime of tea garden in Hubei Province,and put forward measures about soil fertility cultivation of tea garden,including deep flipping,organic fertilizer dressing,equilibrium dressing,increasing coverage,intercropping green manure,regulateing soil acidity,mixing sandy to soil,and seting up compound tea plantation,etc for reference.
分析了该地区茶园土壤状况,包括土壤养分、土壤物理性状、土壤酸度与土层深度等。
5) status of phosphorus
磷素状况
1.
This experiment was done in the located fertilization experiment of non-calcareous fluro-aquic soil,the effects of long-term located fertilization on the status of phosphorus in soil was studied.
基于无石灰性潮土长期定位试验,研究长期施肥对土壤磷素状况的影响的结果表明,在无石灰性潮土上长期单施有机肥、有机—无机肥配施、氮磷钾配施能提高土壤Ca-P,Fe-P,Al-P的含量,降低O-P的含量。
6) soil phosphorus
土壤磷素
1.
Effects of Long-term Fertilization on the Spatial Distribution, Availability and Transformation of Soil Phosphorus in Loess Plateau;
黄土旱塬长期定位施肥对土壤磷素分级、空间分布及有效性的影响
2.
Experiments of field runoff plots,which were conducted at vegetable plots in Hongsheng town of Wuxi city—the typical region of Taihu Basin,were designed to assess the effects of different rainfall intensities on soil phosphorus runoff loss from vegetable plots by artificial rainfall simulations.
以太湖流域典型区域无锡市近郊区鸿声镇的蔬菜地为研究对象,采用人工模拟降雨的方法,通过野外径流小区试验,研究了不同雨强对菜地土壤磷素径流流失的影响。
3.
The effects of different phosphorus levels (0,30,75,150kg/hm2) on characteristics and forms of soil phosphorus loss in runoff by artificial rainfall studied.
结果表明,不同形态磷素随降雨-径流过程的变化趋势基本一致,即初始阶段浓度大且下降速度快,,大约产生径流20min后,浓度下降变得缓慢,直到最后趋于稳定;在整个降雨-径流过程中,颗粒态磷(PP)占总磷(TP)72%~87%,是土壤磷素径流流失的主要形态。
补充资料：土壤磷素吸附和解吸作用
土壤磷素吸附和解吸作用
adsorption and desorption of phosphorus in soil
磷与一OH基或一0H2其过程如下: (1)HZPO不和0H2进行配位交换而被专性吸附。交换即: OH] \/l M} /\lo/0H2曰\OH \/+H:PO一se/\0H2」 O H 十一﹁|l||习OH/\ 《)-P-心 /\OH OHOH M\\/\ O M/\ 0H:」(2)或者HZPO不和OH一交换，即Ho/ M \+HZPO不—一|一| HH/00\/ M/\/ 00H2 片 O 十刁|lwe|10H2\/\ (卜一P-城〕 /\OH OH OH一 /M \ 0H2一 \/ 0 过程(l)并不伴随着溶液的pH值改变，过程(2)可使溶液的pH值上升. 上述两过程的产物，随着时间的延续，都可以变为环状结构: OH+HZO;二二二已 OH一/\ OH:一 MM\/\/ 0+ZH:0/\/\ 0H21，，土城麟素吸附和解吸作用(adsorp‘on anddesorption of Phosphorus in 5011)土壤溶液中的碑酸离子被土城固相所吸持，谓之吸附。其逆向反应谓之解吸.吸附和解吸开始时都是发生在土壤固、液相的界面上.吸附作用可以发生在具有不变电荷土粒的表面(如结晶态的粘土矿物)，也可以发生在可变电荷的土粒表面(如铁铝氧化物、土壤有机质和方解石等物质)上。 碑素吸附土城对碑酸离子的吸附，分为物理吸附(非专性吸附)和化学吸附(专性吸附). 物理吸附当土城溶液的pH值低于土壤吸附剂的等电点时，吸附剂上的一OH墓被质子化: Me一OH+H+一Me一0H2+而后带正电荷的表面因静电引力吸引带负电的磷酸离子。
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