Dry weight, root length, and nutrient (N, P, K, Ca, and S) uptake. Root length had a robust positive correlation with plant fresh weight, leaf location, and nutrient (K and P) uptake. Fresh fresh weight, leaf region, and nutrient (K and P) uptake. Fresh good correlation with plant weight had aasignificantlypositive correlation with nutrient (N, P,(N,and K and S) uptake, and weight had significantly optimistic correlation with nutrient K P, S) uptake, and dry dry weight was considerably correlated with all nutrient absorption, especially with N weight was considerably correlated with all nutrient absorption, specially with N uptake uptake (Pearson’s correlation coefficient: 0.849). (Pearson’s correlation coefficient: 0.849).Figure 3. Correlations among plant growth parameters and plant nutrient uptake. Pearson’s correlation coefficients are are Figure three. Correlations among plant development parameters and plant nutrient uptake. Pearson’s correlation coefficients presented. “” “” denotesp0.05 and “” denotes pp0.01. presented. denotes p 0.05 and “” denotes 0.01.three.4. Nutrient Use Efficiency beneath Various Flow Prices 3.four. Nutrient Use Efficiency under Various Flow RatesThe nutrient use efficiency under distinct substrate flow rates is shown in Figure four. Figure 4a shows that with an elevated flow price from two to four L/min, the MCC950 In Vitro Nitrogen useAgronomy 2021, 11,use efficiency (KUE) decreased by 22.0 , while further intensification in the flow price to six L/min and eight L/min resulted in increases in KUE by 17.1 and 36.6 , respectively. With an increased flow price from two to 4 L/min, the calcium use efficiency (CaUE) improved by 45.2 (Figure 4d), though with an improved flow rate from four to six L/min, CaUE decreased by 27.six . Additional growing the flow rate from 6 to eight L/min induced the CaUE 7 of 11 to increase by 76.7 . As can be noticed from Figure 4f, with an improved flow price from 2 to four L/min, the sulfur use efficiency (SUE) increased by 9.2 and additional growing the flow rate to six efficiency (NUE) decreased in 3.5 , when together with the SUE values were L/min at all flow L/min resulted inside a reduce by the SUE by 8.five .an increase from 4 to six similar and from six to except for a NUE elevated by 19.three and 26.0 , rates eight L/min, thesignificant 54 boost at eight L/min. respectively.(a)(b)Agronomy 2021, 11, x FOR PEER REVIEW8 of(c)(d)(e)(f)Figure four. Nutrient use efficiency under diverse flow rates (values are calculated by dry weight/nutrient uptake of aa complete Figure four. Nutrient use efficiency under distinct flow prices (values are calculated by dry weight/nutrient uptake of whole plant). (a) Nitrogen use efficiency (NUE); (b)(b) phosphorus efficiency (PUE); (c) potassium use efficiency (KUE); (d) calcium plant). (a) Nitrogen use efficiency (NUE); phosphorus use use efficiency (PUE); (c) potassium use efficiency (KUE); (d) calcium use efficiency (CaUE); (e) magnesium use efficiency(f) sulfur use efficiency (SUE). There have been significant differences (MgUE); (f) sulfur use efficiency (SUE). There had been Cabozantinib c-Kit important use efficiency (CaUE); (e) magnesium use efficiency (MgUE); variations within the bars marked with different letters (p 0.05). Data are expressed as indicates standard error (n = four). inside the bars marked with distinctive letters (p 0.05). Information are expressed as suggests regular error (n = 4).four. Discussion Root extension, mass flow, and diffusion are the principal forms of plant nutrients in soil moving for the root surface [19]. As opposed to soil, the culture substrate (nutrie.