| 引用本文: | 肖哲元,雷宏军,张振华,等.加气灌溉下基于Logistic模型的辣椒生长特性和产量研究[J].灌溉排水学报,2022,():-. |
| xiaozheyuan,leihongjun,zhangzhenhua,et al.加气灌溉下基于Logistic模型的辣椒生长特性和产量研究[J].灌溉排水学报,2022,():-. |
|
| |
|
|
| 本文已被：浏览 704次 下载 0次 |
|
|
|
| 加气灌溉下基于Logistic模型的辣椒生长特性和产量研究 |
|
肖哲元1, 雷宏军1, 张振华2, 张倩3, 金翠翠1, 孙克平1
|
|
1.华北水利水电大学 水利学院;2.鲁东大学 资源与环境工程学院;3.山东农业大学 水利土木工程学院
|
|
| 摘要: |
| 【目的】探明水氮气组合对土壤物理性质、作物生长特性和产量的影响，为水、肥、气一体化条件下蔬菜增产增效提供借鉴指导。【方法】以辣椒为研究对象，设置施氮量（225和300 kg·hm-2）、通气量（通气比率为0和15%）和灌水量（0.6和0.9倍作物-蒸发皿系数）3因素2水平随机区组试验，采用Logistic模型拟合辣椒株高的动态生长及定量分析生长特征，进一步研究不同组合处理下辣椒土壤物理性质、干物质量和产量的变化效应。【结果】果实膨大期灌水后2d内，低氮（常氮）高水量不加气和低氮（常氮）高水量加气下的土壤充水孔隙率（WFPS）较低水量对照组分别增加12.7%（13.6%）和14.5%（12.2%）；低氮（常氮）低水量加气和低氮（常氮）高水量加气下的土壤氧气扩散速率（ODR）较不加气对照组分别提高11.9%（10.2%）和17.8%（10.8%）（P<0.05）。不同处理下辣椒株高变化均符合Logistic回归模型，且拟合度较高达到极显著水平（P<0.01）；移值后第49~87 d，低氮（常氮）低水量加气和低氮（常氮）高水量加气下的辣椒株高较不加气对照组分别提高6.1%~7.3%（6.7%~7.6%）和5.7%~8.0%（7.0%~9.0%）（P<0.05）；各处理的辣椒株高增长速率均呈现先增加后减小的特点，且加气和常氮处理的快增期持续时间较不加气和低氮处理分别提前2.2~7.5 d和1.2~6.4d。【结论】通气量和施氮量的增加使辣椒提前进入快增期，提高了增长速率，更有利于辣椒生长。加气灌溉能有效促成辣椒地上部干物质的积累和产量的增加，且与土壤物理性质的变化和植株良好的生长密切相关。 |
| 关键词: 辣椒;加气灌溉;Logistic模型;生长特性;产量 |
| DOI： |
| 分类号:S275.6 |
| 基金项目:国家自然科学基金(52079052),河南省科技攻关计划项目(212102110032),山东省重点研发计划重大科技创新工程项目(2019JZZY010710) |
|
| Study on growth characteristics and yield of peppers based on Logistic model under aerated irrigation |
|
xiaozheyuan1, leihongjun1, zhangzhenhua2, zhangqian3, jincuicui1, sunkeping1
|
|
1.School of Water Conservancy, North China University of Water Resources and Electric Power;2.School of Resources and Environmental Engineering, Ludong University;3.College of Water Conservancy and Civil Engineering, Shandong Agricultural University
|
| Abstract: |
| 【Objective】Effects of gas and nitrogen coupled irrigation on soil physical properties, crop growth characteristics and yield, and the relationship between soil aeration. results of this research would provide a reference guidance for increasing the yield and efficiency under gas and fertilizer coupled irrigation in the greenhouse cropping system.【Method】In this study, a three-factor randomized block experiment was designed with two levels of nitrogen application rate as 225 and 300 kg/hm2, two aeration levels of air void fraction as 15% and 0, and two levels of irrigation amount of 0.6 and 0.9 times of crop/pan coefficient on the experimental farm of North China University of Water Resources and Electric Power (34°47′5.91″N, 113°47′20.15″E), Henan province, China. Taking the greenhouse pepper as test crop, the Logistic mathematical model was used to fit the dynamic growth and quantitative analyze growth characteristics of pepper plant height, and the effects of soil physical properties, dry matter and yield of pepper under different gas and nitrogen coupled irrigation treatments. 【Result】On the 2th day after irrigation at fruit expanding period. Compared with 0.6 times of crop/pan coefficient treatment, the soil water-filled pore space (WFPS) in the treatments of 225 kg/hm2, 0 and 15% air void fraction, 0.9 times of crop/pan coefficient increased by 12.7% and 14.5%, respectively. Compared with 0.6 times of crop/pan coefficient treatment, the soil water-filled pore space (WFPS) in the treatments of 300 kg/hm2, 0 and 15% air void fraction, 0.9 times of crop/pan coefficient increased by 13.6% and 12.2%, respectively. Compared with non-aeration treatment, the oxygen diffusion rate (ODR) in the treatments of 225 kg/hm2, 0.6 and 0.9 times of crop/pan coefficient, 15% air void fraction average increased by 11.9% and 17.8%, respectively. Compared with non-aeration treatment, the oxygen diffusion rate (ODR) in the treatments of 300 kg/hm2, 0.6 and 0.9 times of crop/pan coefficient, 15% air void fraction average increased by 10.2% and 10.8%, respectively (P<0.05). Pepper plants height conformed to Logistic regression model and the degree of fit was very significant under different treatments(P<0.01). On the 49~87 d after transplanting. Compared with non-aeration treatment, the pepper plant height in the treatments of 225 kg/hm2, 0.6 and 0.9 times of crop/pan coefficient, 15% air void fraction average increased by 6.1%~7.3% and 5.7%~8.0%, respectively. Compared with non-aeration treatment, the pepper plant height in the treatments of 300 kg/hm2, 0.6 and 0.9 times of crop/pan coefficient, 15% air void fraction average increased by 6.7%~7.6% and 7.0%~9.0%, respectively (P<0.05). Under the different treatments, the pepper height growth rate showed the characteristics of rapid rise and fall, and the pepper height was 2.2~7.5 d and 1.2~6.4 d earlier in the aerated treatment and 300 kg/hm2 nitrogen application rate treatment, respectively, compared with the non-aeration treatment and 225 kg/hm2 nitrogen application rate treatment.【Conclusion】15% air void fraction and 300 kg/hm2 nitrogen rate resulted enter the rapid growth period in advance and increase the growth rate is more conducive to pepper growth. Aerated irrigation can effectively promote the accumulation of aboveground dry matter and the increase of yield, and is closely related to the improvement of soil physical properties and good growth activities. |
| Key words: pepper, aeration irrigation; Logistic model; growth characteristics; yield |
|
|
|
|
