摘要:
近年来,微量元素对植物生长发育的影响日益受到人们的重视。实验证明这类元素不仅对一些农作物如水稻和小麦[1,3,4]等的早期生长有促进作用,而且对一些藻类植物如小球藻[1]等也有同样作用。正是在这种情形下,利用锰离子提高作物生产的实验正在开展中。从已有报导来看,锰肥的施用对不少种植物有明显效应。如当锰量适当时,玉米籽粒的重量可以大为增加[4]。反之如果缺锰,小球藻的氮代谢——尤其是硝酸盐的同化作用过程就会受到影响。这时如果在培养液中增加锰浓度,可见在短时间内,光合作率就能成倍增加。
Abstract:
(1)We treated the seedlings of Laminaria japonica with MnCl2 solution in various conceiitrations of 5,10,20,50,100,200 ppm.When treated with low concentrations of MnCl2 solutions of 5,10,20,50ppm,the growth of the seavreed both in length and in weight is evidently enhanced,The optimum concentrations are 10 and 20 ppm.Higher concentrations,such as 100,200 ppm,are inhibiting to the growth of the plant.But at the time of harvest,the contents of carbon,nitrogen and phosphorus of all the seaweed treated with various concentra ons of Mn are higher than that of the control group.The carbon and nitrogen contents are the highest in the 10 and.20 ppm Mn treated groups,and ph sphorus contents are the highest in the 20 and 50 ppm Mn treated groups.
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