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通过云南 5年生田间小粒咖啡 (Coffeaarabica)进行 2种施肥 (低肥和高肥 )和在干季秸秆覆盖、滴灌、秸秆覆盖 +滴灌、对照 4种水分处理对植株生长和叶片光合特性影响的测定研究 .结果表明 ,小粒咖啡一年生长周期中最高峰期在雨季始期 ,次高峰期在雨季中期 .水分处理对生长高峰期株高和分枝长度的相对生长率没有显著作用 ,高施肥量则加大了其相对生长率 .干季水分处理提高了叶片的Pn、gs、Tr和WUE ,而叶绿素的荧光特征没有受到影响 .在湿季 ,高施肥量使叶片含氮量Pn增加 ,对gs 和Tr的影响较小 ,从而导致WUE提高 .高施肥量显著减小日间光抑制程度 ,加大了光合机构的实际光化学效率和热耗散能力 ,提高了对强光环境的适应性 .研究表明 ,小粒咖啡需要高养分的投入和良好的水分管理 ,湿季是小粒咖啡进行光合和生长的最优季节 ,干季田间秸秆覆盖 +滴灌的效果较好 ,滴灌和秸秆覆盖的效果相近 .
The effects of four kinds of fertilizers (low and high fertilizers) and photosynthetic characteristics on leaf growth and photosynthetic rate under four kinds of fertilizers (Coffeaarabica) and straw mulching, drip irrigation, straw mulching + drip irrigation in dry season and control The results showed that the peak of one-year growth period of small-grain coffee was in the beginning of the rainy season and the next peak was in the middle of the rainy season.Water treatment had no significant effect on the relative growth rate of plant height and branch length at the growth peak, The relative growth rate was higher than that of the control.The dry season moisture treatment increased the Pn, gs, Tr and WUE of leaves, while the fluorescence characteristics of chlorophyll were not affected.In the wet season, the high fertilizer application increased the leaf nitrogen content Pn, Tr, which led to the increase of WUE.The high amount of fertilizer significantly reduced daytime light inhibition, increased the actual photochemical efficiency and thermal dissipation capacity of photosynthetic apparatus, and improved the adaptability to bright light environment. , Small grain coffee needs high nutrient input and good water management. The wet season is the optimal season for photosynthesis and growth of small grain coffee, and the coverage of straw in dry season + the effect of drip irrigation Better, drip irrigation and straw mulching effect is similar.