摘要
烤烟NC89、LJ85 1、LJ91 1在旺长期生长迅速 ,耗水量大。烟株生长的最适宜土壤相对含水量应保持在 75 %～ 85 % ,此土壤水分条件下的中午光合速率的下降是气孔限制所致。当土壤相对含水量低于 75 % ,光合非气孔限制因素开始出现。当土壤相对含水量低于 65 %时 ,非气孔限制逐渐成为光合下降主导因子 。
The flue-cured tobacco of NC89?LJ851?LJ911 grow rapidly , consume water a lot in the vigorous growing stage. The level of relative soil water content had better be kept at 75%～85%. The fall of photosynthesis rate at noon is brought by stomatal limitation. When relative soil water is below 75%, the cause of photosynthesis rate drop is non-stomatal limitation. The non-stomatal limitation play dominant role in decline of photosynthesis while relative soil water content is below 65% which could do harm to photosynthesis organ.
出处
《植物研究》
CAS
CSCD
北大核心
2002年第2期179-183,共5页
Bulletin of Botanical Research
关键词
烤烟
旺长期
气孔限制
非气孔限制
水分胁迫
光合速率
Flue-cured tobacco
water stress
photosynthesis rate
stomatal limitation
non-stomatal limitation
