作　　者： (万梦丹）; (刘小刚）; (徐航）; (吴昊）; (齐韵涛）; (王露）; (杨启良）;

机构地区： 昆明理工大学现代农业工程学院,云南昆明650500

出　　处： 《排灌机械工程学报》 2016年第9期795-803,共9页

摘　　要： 为探明小粒咖啡水分和光照耦合管理模式，采用盆栽试验，研究3个灌水水平（WH：高水；WM：中水；WL：低水）和3个光强水平（S0：不遮阴；S1：轻度遮阴；S2：重度遮阴）对小粒咖啡叶片光响应曲线、光合、蒸腾及气孔导度等生理指标的影响．结果表明：遮阴对小粒咖啡叶片的叶绿素及胡萝卜紊含量的影响大于灌水，与不遮阴相比，增大遮阴强度使叶绿素总量和叶绿素b分别增大13．53％～260．21％和31．10％～412．91％；不遮阴和轻度遮阴时，与低水相比，增大灌水量使叶绿素口、叶绿素b和叶绿素总量分别增大13．30％-110．65％，92．11％～148．36％和39．85％～124。30％；不遮阴和轻度遮阴时，与低水相比，增大灌水量提高最大净光合速率26．61％～185．27％；而重度遮阴时，增大灌水量使最大净光合速率先增大后减少，中水和低水时，与不遮阴相比，增大遮阴强度使最大净光合速率增大10．73％-103．73％；不同灌水和光强条件下咖啡叶片的净光合速率、蒸腾速率以及气孔导度日变化均呈双峰型，与不遮阴相比，增大遮阴强度使叶片日均净光合速率和日均气孔导度分别增大12．36％～57．74％和4．56％-42．66％，而降低日均蒸腾速率；与低水相比，日均气孔导度和净光合速率随着灌水量增大而显著增大；轻度遮阴和高水组合水分利用效率最大，同时光能利用效率和最大净光合速率最大，S1WH为小粒咖啡水光高效利用组合． To explore coupled management mode of water and light intensity for tropical economic erop-coffea arabica L. tree, the effects of irrigation and light intensity levels on light response curve, photosynthetic, transpiration, stomatal conductance and other indexes are studied on coffea arabica L. leaf by using three levels of irrigation （WH-high water content level, WM-moderate level, WL-low wa-ter） and three levels of light intensity （S0-no shading, St-slight shading, S2-severe shading）. The re- suits show that the effects of shading on the chlorophyll content and carotenoid pigment in coffea arab# ca L leaf are greater than those of irrigation. Compared with no shading, an increased shading intensity can raise the total chlorophyll and chlorophyll b by 13. 53% -260. 21% and 31.10% -412.91%, respectively. Compared with the low water content level, an increased irrigation level can increase the chlorophyll a, and b, total chlorophyll by 13.30% - 110.65%, 92.11% - 148.36% and 39.85% - 124.30%, respectively, under no shading and slight shading conditions. Compared with the low water content level, an increased irrigation level can increase the maximum net photosynthetic rate under no shading and slight shading conditions; under severe shading condition, however, the maximum net photosynthetic rate on longer increases with the increasing irrigation level steadily. Compared with the low water level, the increased shading degree can increase the maximum net photosynthetic rate by 10. 73% -103.73%. The diurnal variations of net photosynthetic rate, transpiration rate and stomatal conductance all exhibit a double-peak curve under different irrigation and light intensity conditions. Compared with the no shading case, the increased shading degree can increase the net photosynthetic rate and stomatal conductance by 12.36% -57.74% and 4.56% -42.66%, respectively, unfortu- nately the daily transportation rate is deduced significantly. Compared with the low water level case, an increased irrigation level can substantial

关 键 词： 小粒咖啡 光响应曲线 光合蒸腾 灌水水平 气孔导度 光照水平