From Equations 9 and 10. We usesamples SWH, NRSWL, K balance cycle had been moved in e, l direction movement; soil samples RSWKL, RSWH, RSWL, K balance cycle had been moved in h, l path movement; soil samples RSWKH RSKH, RSKL ROPTH, ROPTL, NRSWKH, NRSKH, NRSKL, NROPTH, NROPTL K balance in soil samples, K balance cycle have been moved in h, v direction movement respectively. As is shown in Fig. 7, neK reaches its equilibrium in following soil plots, including LEG (SW), HEG (SK), LEG (OPT), and LEG (SW). Along with the exchangeable K reaches its equilibrium in soil types of LEG (SW). For other remedy soils, such as LEG (SW andPLOS A single | www.plosone.orgStatus Changes of Soil PotassiumTable 9. Direct and indirect correlation coefficients of nonexchangeable potassium (neK).Variables Z(S) Z(Na/K) Z(TN) Z(Na) Z(PHA) Z(ORP) Z(Mg) Z(CO3) Z(K) Z(pH) Z(HMi) Z(CIA) Z(wsK) Z(SOM) Z(eK) doi:10.185990-03-8 Order 1371/journal.pone.0076712.tDirect correlation coefficients 20.86 20.66 20.64 20.61 20.46 20.41 0.04 0.ten 0.44 0.46 0.48 0.56 0.77 0.8 0.Indirect correlation coefficients 0.19 0.02 0.03 20.34 0.03 0.ten 20.67 1.18 20.14 20.16 0.07 0.05 0.01 20.11 0.Path contrition coefficient 20.25 0.03 20.03 20.37 0.16 20.42 20.34 0.56 0.two 20.50 0.06 20.07 0.01 20.14 0.SK), LEG (SW), LEG (SK), HEG (SW and SK), HEG (OPT), neK adjustments to eK much more or much less. In soil of HEG (SW and SK), eK alterations to wsK when wsK was lower than equilibrium. In soil of LEG (SW and SK), neK adjustments to eK when wsK of soil was higher than that of crops. Soils of each genotypes cotton (HEG and LEG) can effectively absorb exchangeable potassium. Throughout a great deal of vermiculite within the soil, those negative charges triggered by vermiculite isomorphous substitution are near psite, the electrostatic attraction of potassium ion became larger, the adsorption capacity significantly a lot more than other sort (2:1) minerals, consequently, wsK and neK are fixed and also the soil changed into deficiency. Generally, drying accelerated the fixation of wsKadsorption, but neK nevertheless moved in the direction of eK in the reversible equilibrium in HEG rhizosphere soil mainly because rhizosphere soil exchangeable potassium content was low to meet the demands in the cotton development inside the SW and SWK plant. When moisture was adequate, redox reaction of soil became strengthened and oxidation reduction prospective was decreased. For example, Fe2 and Mn2 ions have been elevated quickly, Fe2 and Mn2 replaced psite potassium of soil colloids and a part of isite potassium, and this improved the content material of rapidlyavailable potassium and biological successful parts. In addition, the dissolved iron and manganese mineral alteration as well as elevated the release of mineral K.1-Cyclohexyl-2,2,2-trifluoroethan-1-ol Price Table ten.PMID:23795974 Direct and indirect correlation coefficients in exchangable potassium (eK).Variables Z(S) Z(Na/K) Z(TN) Z(Na) Z(PHA) Z(ORP) Z(Mg) Z(CO3) Z(pH) Z(K) Z(CIA) Z(HMi) Z(wsK) Z(SOM) Z(neK) doi:10.1371/journal.pone.0076712.tDirect correlation coefficients 20.83 20.67 20.62 20.55 20.51 20.38 0.07 0.11 0.47 0.48 0.51 0.54 0.73 0.74 0.Indirect correlation coefficients 20.28 20.03 20.04 0.46 20.06 20.16 0.95 21.7 0.23 0.21 20.07 20.09 20.01 0.18 1.Path contrition coefficient 0.36 20.04 0.04 0.54 20.24 0.6 0.49 20.81 0.71 20.three 0.1 20.09 20.02 0.two 1.PLOS One particular | www.plosone.orgStatus Adjustments of Soil PotassiumTable 11. Fertilizing rates of different remedies (unit: g).Remedies Urea Na2PO4.2H2O KCl CaCO3 H3BO3 ZnSO4.7H2O MgSO4.7H2OOPT six.65 11.72 six.83 two.13 1.00 1.87 2.SW six.65 11.72 6.83 2.13 1.00 1.87 2.SK six.65 11.72 0 two.13 1.00 1.87.