The corresponding values observed in 2019-2020 were 0.110 g/(cm²·d), 0.089 g/(cm²·d), 0.004 g/(cm²·d), -0.010 g/(cm²·d) and -0.010 g/(cm²·d), respectively. Which implied that the profile of 40-80cm existed soil salt accumulation in the initial thawing stage, while the salt accumulation rate in 0-100cm profile was decreased with the increase of winter irrigation amount. 

这里面Which引导定语从句为什么大写？可以这么使用吗？