Effects of Different Regulatory Methods on Improvement of Greenhouse Saline Soils, Tomato Quality, and Yield

Table 5

Comprehensive quality index, soil salt content in plough layer, and tomato yield.

Treatment	Comprehensive quality index			Salt in plough layer (g kg^−1)			Tomato yield (t hm^−2)
	2011	2012	2013	2011	2012	2013	2011	2012	2013
CK	3.014	2.872	2.617	1.47	1.46	1.27	103.84	108.68	112.47
Straw mulching	1.000	1.000	1.713	1.10	0.82	0.64	136.56	145.73	157.22
Soil structure conditioner	1.757	1.554	1.000	1.23	0.96	0.71	122.39	139.28	134.55
Water-retaining agent	2.339	1.830	1.956	1.55	1.39	1.13	128.96	135.47	145.71