地膜在土壤中的残留量对茄子生育和产量的影响

The Effect of Residual Quantity of Broken Plastic Film in the Cultivated Soil on Growth and Yield of Eggplant

经３年连续试验表明：盆栽试验６～４８ｋｇ／６６７ｍ＾２的地膜残留量对茄子株高，茎粗和叶面积基本无影响，对根系增长量的影响大于地上部，随着残留量的增加“根冠比”值有上升趋势但未达显著水平，对氮，磷，钾吸收的影响在Ｐ２Ｏ５上有差别，田间试验表明：残留量在３～９６ｋｇ／６６７ｍ＾２范围内不论早期产量，总产量还是采收果数仅差０．９％～１．５％。

The results of this experiment in 3 years are as follows: Pot experiment. The residual quantity of broken plastic film at 90～720kg/ha has no effect on the plant height, stem thickness and leaf area. The value of T/R ratio increased as the incerase of residual quantity of broken plastic film, but the correlation is not significant. The residual quantity of broken plastic film could effect the absorbability of plant to P_2O_5. Field plot experiment The variation of early yield, total yield and fruit numbers at 45～1440kg/ha (residual quantity) is only 0.9%～1.5%.