通过有限灌水技术试验证实，穴灌的净增值率高达58.7%。

The experiment of limited irrigation indicated that the increase in value of den irrigation reached up to 58.7%.

然而尚存在引进技术水平不高、增值率低和波及效应差等问题。

However, some problems still exist such as the poor imported technological level, value - adding ratio and spreading effect.

据苏富比、佳士得二十世纪八十年代至今的拍卖记录，中国明清官窑彩瓷年增值率为百分之二十以上。

According to the records of Sotheby and Christie, Royal porcelain of Ming and Qing dynasty enjioyed the increment of 20%.

主要观察指标：形态观察、增值率测定、碱性磷酸酶染色、细胞基质钙含量测定、茜素红染色显示矿化结节数。

MAIN OUTCOME MEASURES: Morphological observation, determination of proliferation ratio, ALP stain, determination of matrix calcium accumulation and number of mineralized nodes with alizarin red stain.