| 摘要: |
| 【目的】研究滴灌条件下灌水下限与施钾量耦合对大棚厚皮甜瓜产量和可溶性固形物含量的影响。【方法】以厚皮甜瓜“一品天下208”为材料，采用二因素二次通用旋转组合设计，通过塑料薄膜隔离小区栽培，分别建立产量、可溶性固形物含量与灌水下限和施钾量的回归模型，并分析灌水下限和施钾量2因素的耦合效应。【结果】灌水下限、施钾量对甜瓜产量和可溶性固形物含量均有显著影响。在本试验条件下，施钾量对产量和可溶性固形物含量的影响均大于灌水下限；二者对甜瓜产量和可溶性固形物含量有交互效应，其中对产量的影响为负交互作用，对可溶性固形物含量的影响为正交互作用。当灌水下限为64%～69%，施K2O 395～450 kg/hm2时，甜瓜产量高、品质好，产量和可溶性固形物含量分别可达41 800 kg/hm2和15.9%。【结论】充分利用灌水下限和施钾量的耦合效应可以保证甜瓜的高产、优质。 |
| 关键词: 水钾耦合 塑料大棚 厚皮甜瓜 产量 可溶固形物 回归模型 |
| DOI： |
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| 基金项目:国家“十二五”科技支撑计划项目（2011BAD12B03-03） |
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| Interactive effects of water and potassium on yield and soluble solid content of plastic greenhouse muskmelon |
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ZHAO Zhihua, LI Jianming, ZHANG Dalong
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NorthwestA&FUniversity
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| Abstract: |
| 【Objective】This experiment was carried out to elucidate the effects of irrigation low limit and potassium coupling on the yield and soluble solid content of plastic greenhouse muskmelon under drip irrigation.【Method】In order to separately model the relation of yield and soluble solid content with water low limit and potassium,and analysis them,we adopted the central composite rotatable design and planted muskmelon in test plots segregated by plastic film.【Result】We separately got the prominent models of yield and soluble solid content under the coupling irrigation low limit and potassium.Both yield and soluble solid content were influenced by potassium more than by water.Both the two factors had interacted effects on yield (negative) and soluble solid content (positive).When irrigation low limit was from 64% to 69% and potassium was from 395 kg/hm2 to 450 kg/hm2,a higher yield of 41 800 kg/hm2 and a higher soluble solid content of 16.7% were obtained.【Conclusion】Taking full advantage of the coupling of water low limit and potassium obtained high yield and good quality. |
| Key words: water-potassium coupling plastic greenhouse muskmelon yield soluble solid content regression model |
