摘要
马铃薯叶面积、叶干重以及块茎干物重和块茎体积的变化动态均符合三次曲线变化 ,地上茎干重、茎粗、株高符合S型曲线变化 ,其中 ,叶干重的峰值早于叶面积的峰值 ,块茎体积的增长则在出苗后 5 5～ 70d内最快。马铃薯地上茎的生长主要是伸长与充实 ,但伸长较充实缓慢、持续时间更长。匍匐茎与块茎的形成是马铃薯产量形成的前提条件 ,二者的建成与植株其它器官的生长发育密切相关 :匍匐茎和块茎的形成与叶片和地上茎形成时期并进 ,所以 ,马铃薯块茎的建成与地上营养器官的生长发育存在着光合产物的竞争 ,但地上部器官的建成依然是产量形成的物质基础。
The dynamic change in leaf area is very similar to those in dry weight of leaves, dry weight of aboveground stem, plant height, stem thickness, and dry matter weight and size of tuber. The changes in all traits mentioned above can be described by using cubic polynomials. The peak of leaf dry matter appeared earlier than leaf area. The tuber size increased rapidly during the period of 55～70 days after emergence. The growth of aboveground stem was mainly due to the increase in the length and thickness of stem. The increase in length of stem was slower, but can be keep longer compared with in thickness. The formation of stolon and tuber played a key role in the determination of tuber yield, and the establishment of stolon and tuber was closely correlated to the growth and development of other plant organs. The period of formation of stolon and tuber was consistent with that of leaf and stem. The tubers and aboveground part competed for the photosynthate, but the establishment of aboveground part was still the material foundation for yield formation.$$$$
出处
《中国马铃薯》
2003年第3期141-145,共5页
Chinese Potato Journal
