1) soil available phosphorus
土壤速效磷
1.
According to the analysis data of 173 sampling points in 1982 and 117 sampling points in 2002, the temporal-spatial variability of soil available phosphorus (SAP) of the topsoil(0~20 cm) in Chengdu Plain was expressed by spherical semi-variance model and the ordinary Kriging interpolated method.
根据1982年173个样点和2002年117个样点的分析数据,利用地统计学方法和GIS技术对成都平原耕层(0~20cm)土壤速效磷含量的时空变异特征进行了研究。
2.
Soil available phosphorus, to a large degree, determines the content and distribution of soil glomalin.
土壤球囊霉素分别与土壤速效磷、蛋白酶呈显著正相关(P<0。
2) available phosphorus distribution
土壤速效磷分布
3) Soil available phosphorus
土壤有效磷
1.
Our main aim was to investigate small-scale spatial cross-correlation between population variables of clonal plant species and soil available phosphorus.
该研究主要探讨小尺度上克隆植物与土壤有效磷之间的空间相关性,特别是它们的相似性。
2.
Arbuscular mycorrhizal development of 12-year-old Ginkgo biloba(Jiafushou seedlings and Jiafushou/Jiafushou grafted plants) and its correlation with soil available phosphorus were observed in the experiment in field.
以田间栽培的12a生银杏(Ginkgo biloba)实生苗"家佛手"和本砧嫁接的"家佛手"嫁接苗为试材,观察根系丛枝菌根的状况及其与土壤有效磷的关系。
3.
【Objective】 The objective of this study was to explore the spatial distribution of soil available phosphorus, and to provide a firm foundation for scientific formulated fertilizer and identify key regions for controlling agricultural non-point phosphorus pollution.
【目的】探明土壤有效磷的空间分布,为合理科学配方施肥和识别农业面源磷污染重点控制区提供依据。
4) Soil available P
土壤有效磷
1.
This study was aimed at providing a model for the long-term changes in soil available P.
结果表明:经参数调整后的模型对河南潮土土壤有效磷的预测值与实测值之间呈极显著相关关系,相关系数达到0。
6) soil available nitrogen
土壤速效氮
1.
This study investigated the effect of soil nitrogen regulator on soil available nitrogen.
研究了土壤氮素调理剂对土壤速效氮含量的影响。
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