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“绿色革命”以来大气CO2浓度升高对C3作物营养品质的影响
李聃枫, 朱春梧
土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)
摘要:
自20世纪60年代“绿色革命”以来,育种技术和农耕技术的发展促进了农作物产量的大幅提升,然而作物的营养品质出现下降趋势。在相似的遗传背景下,大气CO2浓度升高会使单位体积农作物产品的营养元素含量下降,因此“绿色革命”至今,农作物产品的营养元素下降可能受大气CO2浓度升高影响。通过植物生长箱模拟“绿色革命”初期和目前的大气CO2浓度水平(310 μmol/mol和400 μmol/mol),针对主要C3作物水稻、小麦和大豆,研究“绿色革命”以来大气CO2浓度升高对其籽粒的C、N、Fe、Zn元素含量的影响,结果表明:CO2浓度升高对3种作物籽粒的C元素含量几乎没有影响,变化幅度在 ±1.5% 之间;籽粒的N、Fe、Zn元素含量普遍呈现下降趋势,但均未达到显著水平。
关键词:  绿色革命  大气CO2  C3作物  营养品质
DOI:10.13758/j.cnki.tr.2020.03.020
分类号:S181
基金项目:国家基础研究计划("973"计划)项目(2014CB954500)、江苏省自然科学基金项目(BK20140063)、中国科学院青年创新促进会项目(2015248)和中科院“十三五”规划前沿项目(Y613890000)资助。
Effects of Elevated Atmospheric CO2 on Nutritional Quality of C3 Crops Since Green Revolution
LI Danfeng, ZHU Chunwu
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences
Abstract:
Since the green revolution (in the 1960s), the output of agricultural production has risen sharply owing to the development of breeding and farming techniques, while the nutritional quality of crops has been declining. In similar genetic background, nutrient contents decreased in unit volume of crops under the elevated atmospheric CO2 concentration. Since the green revolution, the decrease of nutrition in agricultural products may due to the elevated CO2 Using the plant growth chambers to respectively simulate CO2 level in the early green revolution(310 μmol/mol) and the current (400 μmol/mol), in this study rice, wheat and soybean (the main C3 crops) were selected to study the effects of elevated CO2 on the C, N, Fe, Zn contents in grains since green revolution. The results showed that the elevated CO2 had little effect on C concentrations in the grains of the three crops, with the change range of ±1.5%. Both N, Fe and Zn concentrations in grains generally showed decreased trends, but the decline did not reach the significant level. Besides, breeding techniques did not relieve the negative effect of elevated CO2 on grain nutritive quality.
Key words:  Green revolution  Atmospheric CO2  C3 crops  Nutrition

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