芒果种植技术大全.doc

several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 。
(3)果实发育开花受精后子房开始膨大，，采果前10-15天增长极缓慢或不增长，这时主要是增厚、充实、增重。从开花稔实至果实青熟，早熟种需85-110天，中熟种100-120天，迟熟种120-150天。在果实发育期间有两次明显的落果高峰：第一次在花后两周左右，主要是受精不良的小果枯黄脱落，落果量较大；第二次在花后4-7周，除小部份是发育不良的畸形果或败育果外，而更多是因养分和水分不足造成落果。，到80-85天只有风害、裂果或病虫害才招致落果。果实收获期在5-7月，因品种和地区而异。
（二）对环境条件要求
1、温度最适生长温度为25-30℃，低于20℃生长缓慢，低于10℃叶片、花序会停止生长，近成熟的果实会受寒害。低于3℃幼苗受害，至0℃严重受害。
2、水分与湿度芒果枝梢生长，开花结果和果实发育都需要有充足的水分。但花期和新梢生长期连续降雨、大雾或空气湿度大易发生病害，影响授粉，并引起枯叶、枯花、枯果。果实发育期多雨易诱发煤烟病和炭疽病，影响果实外观，降低品质，延缓成熟，果实采后也不耐贮运。
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
实用文档
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a