棉花群体叶面积载荷量与产量关系及对源的调节效应研究

通过对棉花单位叶面积负载的生殖器官量的研究结果表明：较高的叶面积载荷量［以单位叶面积负载的果节数（个／ｍ２叶）、结铃数（个／ｍ２叶）及生殖器官干重（ｋｇ／ｍ２叶））能够促进棉花群体叶片光合强度提高和养分向棉铃输送增多，因而群体成铃数增多，产量提高。同时由剪叶、疏蕾试验揭示了，当群体叶面积系数控制在适宜范围内，可通过提高叶面积载荷量使产量进一步上升，群体叶面积系数过大时，通过减少叶面积，提高叶面积载铃量可以使产量增加。而当叶面积过小时，虽叶面积载荷量增大，但终因光合面积太小，产量下降，因此叶面积载荷量可作为反映棉花群体源库是否协调及改进栽培技术的依据。

Smudy on the Relationship of Sink Capacity of unit Leaf Area to Yield and Regulation Effect to Source in Cotton Population

The result showed that the high sink capacity of unit leaf area(fruiting node/m2leaf,boll/m2 leaf,reproductive dry weight/m2leaf)can increase the photosythetic intensi-ty and promote more nutrient into the boll, the boll retained increased and the outputraised. The experiment of cutting leaf area and thinning squares showed that the yield canbe increased with increasing sink capacity of unit leaf area, when the LAI is optimurn, IfLAI is over, the yield can be increased by reducing leaf area,although the sink capacity ofunit leaf area is high,the photosynthetic area is very small. The yield decreased when LAIis low. Therefore, the sink capacity of unit leaf area can be regarded as an index forweighting source sink coordination and improving cutural technology.