Growth and Comprehensive Quality Index of Tomato under Rain Shelters in Response to Different Irrigation and Drainage Treatments

Table 4

Factors and contribution rates of every main ingredient.

Years	PC	X1	X2	X3	X4	X5	X6	CV	CR	ACR
2011	f1	0.783	−0.397	−0.652	0.792	0.970	0.956	3.411	56.851	56.851
	f2	0.221	0.875	0.084	0.559	−0.108	−0.115	1.926	32.106	88.958
2012	f1	0.955	0992	0.980	0.893	0.807	0.672	4.756	79.268	79.268
	f2	−0.290	−0.125	−0.183	−0.439	0.589	0.741	1.222	20.373	99.641

Note: The letter codes are PC (principal components, f₁ and f₂), CV (characteristic values), CR (contribution rate), ACR (accumulated contribution rate), X1 (soluble sugar, SS), X2 (total soluble solids, TSS), X3 (Organic acid, OA), X4 (Vitamin C, V_C), X5 (weight per fruit, MSW), and X6 (volume per fruit, MSV).