Figure 9
From: Effects of different straw return methods on soil properties and yield potential of maize
Structural equation model (SEM) revealing the underlying mechanism of the relationship between straw return and maize yield. The solid and dashed arrows indicate positive and negative relationships, respectively. The number on each arrow indicates the normalized path factor, while the width of the arrow indicates the strength of the normalized path factor. R2 denotes the percentage of variance explained by the model. *, **, and *** represent p < 0.05, p < 0.01, and p < 0.001, respectively. RUBP, ribulose-1,5-bisphosphate carboxylase; LAP, leucine aminopeptidase; PPi, pyrophosphorylase; AK, soil available potassium; AP, soil available P; SOC, soil organic C; TN, total nitrogen; NO3−–N, soil nitrate nitrogen.
