库尔勒香梨根系与地上部生长发育动态及相关性

Correlation and Growth Dynamic State of Growth and Development in Root and Aboveground Organ of Korla Fragrant Pear

为摸清库尔勒香梨根、梢、叶、果的生长发育动态及相关性,从春季树体开始生长到果实采收前,定期观测根系、新梢、叶重、叶绿素含量、果实纵横径等的生长变化量。结果表明,40～70cm深土层内根系生长活跃,年总生长量最大;不同深度土层内的根系存在交替生长现象,上层和中层根系进入生长高峰期较快而时间短,下层根系较慢而时间长。根系的生长高峰期在6月3日至7月8日;新梢的生长高峰期在4月15日至5月24日;叶重和叶绿素含量都较高的时期在6月8日至7月18日;果实生长高峰期在6月17日至7月23日;根、梢、叶、果的生长发育高峰期存在交替和重叠现象。

In order to comprehend the Fragrant Pear,the growth variations of growth and development dynamics and their correlations e root system, new top of tree, content of chlorophyll hori Korla zontal and longitude diameters of fruit etc. were regularly observed. The results indicated that the root system growth in 40-70 cm soil layer was quite lively,who had the greatest growth quantity in all the year,there were alternative growth state in soil layer with different depth. The root system in upper and middle soil layer gets into peak-hour more quickly from June 3 to July 8,but the peak-hour was very short,however, the root system in lower soil layer gets into peak-hour slowly,but it was long.The growth peak-hour of the new top of tree begins from Apr. 15 to May 24 ;The leaf weight and chlorophyll content had their peak-hour from June 8 to July 18;The fruit growth peak-hour begins from June 17 to July 23;all the observed indexes were alternated and overlaped.