日光温室滴灌辣椒水肥耦合效应研究

STUDY ON THE EFFECTS OF WATER-FERTILIZER COUPLING ON HOT PEPPER UNDER DRIP IRRIGATING IN GREENHOUSE

在日光温室滴灌条件下 ,采用三因素二次回归通用旋转组合设计 ,对影响滴灌辣椒产量的水、氮、磷的耦合效应进行了研究。得到了总产量 (y3 )与灌水量(x1)、施氮量 (x2 )、施磷量 (x3 )的水肥耦合回归模型。分析结果表明 :a)在本试验条件下 ,水、氮、磷各因素影响滴灌辣椒产量的顺序为灌水量 >施磷量 >施氮量 ;b)各因素交互作用 ,灌水量与施磷量及施磷量与施氮量的交互作用较显著 ,尤以高水配以低磷 ,高氮配低磷时产量在所取水平范围内产量有最大值。通过计算机模拟 。

By means of quadratic general rotational combination design under the conditions of drip irrigation, the comprehensive effects of N, P fertilizer and water on hot pepper yield was studied with the aid of computer, three water-fertilizer coupling regression models demonstrating the relationships between total yield (y) and the application amount of water (x 1), nitrogen (x 2) and phosphorus were established these models. Analysis result showed that: a)The effects of three fertilizer factors on the yield of hot pepper in different stage of development increased by degree in the series of water, P and N; b)The interaction among these three factors existed, there was distingtive interaction between water P and N, P was significant. Further, high water application level with low P level and high N level with low p level have the most effect on the increase of hot pepper yield. By simulating with computer, the optimal combination of these factors were proposed according to different level of yield of hot pepper of the whole development stages.