在印度卡纳塔克邦进行了光照强度对咖啡实生苗生长影响的大田试验。试验处理为:(1)25％、70％和100％日照;(2)咖啡品种1(中粒种)、3和9(均为阿拉伯种)。实生苗在荫蔽条件下植株更高,叶片和一分枝更多,总干物质更重。干物质的增加归因于净同化率的增加;相对生长率、相对叶片生长率与净同化率相关,但叶面积率和净同化率没有相关。光照强度高看来降低咖啡叶片的净光合作用能力。这些发现证实印度南部要在荫蔽条件下种植咖啡。 In Karnataka, India, field trials of the effect of light intensity on the growth of coffee seedlings were conducted. Test treatments were: (1) 25%, 70% and 100% sunlight; (2) Coffee variety 1 (medium seed), 3 and 9 (all Arabian). Seedlings are shaded under higher plant conditions, with more leaves and more branches and heavier total dry matter. The increase of dry matter was attributed to the increase of net assimilation rate; relative growth rate, relative leaf growth rate was related to net assimilation rate, but leaf area ratio and net assimilation rate were not correlated. High light intensity appears to reduce the net photosynthetic capacity of coffee leaves. These findings confirm that coffee is planted in shaded conditions in southern India.