Calcium nutrition of higher plants
Calcium nutrition of higher plants
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高等植物的钙营养
DOI：
10.18174/njas.v22i4.17212
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发表时间：
1974
期刊：
影响因子：
--
通讯作者：
H. Marschner
中科院分区：
文献类型：
--
作者：
H. Marschner
近年来，农业和园艺植物中钙缺乏症的发生率越来越高，引起了人们对钙营养的极大关注。作为一种主要营养素，高等植物细胞对钙的功能需求似乎很低。然而，由于缺乏选择性和主动吸收以及无法重新转运，使得根表面的钙浓度很高，并且需要不间断地吸收钙。对钙的需求也随着其他矿物元素，特别是阳离子供应的增加而增加。现有的调节机制似乎更多的是向抑制钙的方向发展，而不是促进钙的摄取和长距离运输。更好地了解钙营养的生理方面是必要的。今后应更多地注意使用含足够钙的无机肥料。还必须考虑其他农业和园艺做法对植物钙营养的影响。
The increased occurrence of calcium deficiency in agricultural and horticultural plants has attracted considerable attention to calcium nutrition in recent years. The functional requirement for calcium within the cell of higher plants seems low for a major nutrient. However, lack of both selective and active uptake as well as inability for retranslocation makes a high concentration at the root surface and an uninterrupted uptake of calcium necessary. The requirement for calcium also increases with the increase in supply of other mineral elements, particularly of cations. Existing regulatory mechanisms seem to be more developed in the direction of restric tion rather than promotion of the uptake and long-distance transport of calcium. A better knowledge of the physiological aspects of calcium nutrition is necessary. In future more attention must be given to the use of inorganic fertilizers containing suffi cient calcium. Other agricultural and horticultural practices must also be considered in relation to their effect on the calcium nutrition of plants.