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茭白植株地上部总体上N、K含量较高 ,P含量低。干物质中P、K含量的变化总体呈下降趋势 ,N的含量在孕茭膨大期有一个激增过程。叶片和短缩茎N、P、K的含量变化与植株N、P、K含量变化基本一致。肉质茎膨大过程中N、P、K含量均显著增加 ,叶片和短缩茎的N、P、K含量有不同程度的下降。叶片制造的养分首先送往短缩茎 ,短缩茎积累达一定程度而肉质茎尚未膨大时 ,叶片进行自身积累 ,肉质茎开始膨大后 ,短缩茎内养分送往肉质茎
On the whole, the plant shoots of Nang Bai plant had higher content of N and K and lower content of P. The changes of P and K contents in dry matter generally showed a decreasing trend, and the content of N had a surge in the pregnant and swollen infants. The contents of N, P and K in leaves and shortening stems were basically the same as those of N, P and K in plants. The content of N, P and K in the stems of fleshy stems increased significantly while the contents of N, P and K in leaves and shortening stems decreased to some extent. The leaves are made of nutrients first sent to the shortened stems, shortened stems accumulated up to a certain extent, while the fleshy stems have not yet swollen, the leaves accumulate their own, the fleshy stems began to dilate, shortened stems to the fleshy stems nutrients