长江下游下蜀系黄土丘陵地区,近年来发展了许多新茶园,但经常发现有成片茶树生长不良或死亡的现象。一部分是由于在加灰肥,而变为石灰性或施熏土而变为碱性的黄土性黄棕壤上,造成了茶树生长不良或死亡现象。但在无石灰性及早酸性反应,并且代换性酸和水解性酸都很高的黄棕壤上,也发现茶树成片死亡,根抿我们调查结果,这主要是山于在黄土性黄棕壤内存在着粘盘层,限制了茶树的根系发育,甚至造成了茶树的死亡。但根据江苏省 The Lower Reaches of the Yangtze River is a loess hilly region. In recent years, many new tea gardens have been developed, but the phenomenon of poor growth or death of tea plants is often found. Partly due to the poor growth or death of tea plants due to the yellowish yellow brown soil becoming alkaline due to the addition of ash, which turns into lime or smoked soil. However, in the yellow-brown soil without calcareous and early acid reaction, and with high exchangeable acidity and hydrolytic acid, it was also found that the tea trees died in pieces. According to our findings, The presence of a sticky layer in the soil limits the root development of the tea tree and even causes the death of the tea tree. But according to Jiangsu Province