| 引用本文: | 窦超银,王鼎新,孟维忠,等.风沙土玉米滴灌氮肥适宜用量试验研究[J].灌溉排水学报,2019,38(11):16-21. |
| ,et al.风沙土玉米滴灌氮肥适宜用量试验研究[J].灌溉排水学报,2019,38(11):16-21. |
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| 摘要: |
| 【目的】确定风沙土地区玉米滴灌适宜氮肥用量。【方法】采用田间试验的方法，在高水（IH）和低水（IL）条件下研究高氮（FH）、中氮（FM）和低氮（FL）3种施氮水平对玉米生长和产量的影响。【结果】在低水条件下，增加施氮量有利于植株生长，植株较高，叶面积指数较大；高水条件下增施氮量对植株生长促进作用小于低水条件。2种灌水条件下，地上物质干质量和鲜质量均随施氮量增加而增大，但地上物质含水率、茎粗和叶片叶绿素量受施氮量影响较小。施氮量增加提高了穗长、穗粗、行粒数等考种指标值，从而提高了产量，低水高肥和高水高肥处理产量分别为13.0和13.7 t/hm2，较低肥处理高出20.4%和17.1%。【结论】在风沙土地区，增加施氮量有利于玉米植株生长和提高产量，尤其灌水量小时，作用更为明显。因此，结合试验结果在辽西北风沙土地区玉米滴灌种植施氮量推荐为300 kg/hm2。 |
| 关键词: 氮肥； 滴灌； 风沙土； 玉米； 产量 |
| DOI：10.13522/j.cnki.ggps.2019036 |
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| Experimental Study of the Suitable N-fertilizer Amount for Corn under Drip Irrigation in Aeolian Sandy Soil |
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DOU Chaoyin, WANG Dingxin, MENG Weizhong, TONG Wei, CHEN Wei, YAN Weichen
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1. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225009, China;2. Water Conservancy and Hydropower Science Research Institute of Liaoning, Shenyang 110003, China
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| Abstract: |
| 【Objective】The purpose of this paper is to determine the suitable N-fertilizer amount for corn under drip Irrigation in Aeolian sandy soil.【Method】The experiment was conducted in a field, and the amount of water and N-fertilizer were selected as experiment factors. Two levels of water amount (high and low) and three levels of N-fertilizer dosage (high, middle and low) were scheduled and thus six treatments were carried out. Effects of treatments on the growth and yield of corn were studied.【Result】The results showed that, under low watering condition, increasing N-fertilizer amount was good for plant growth and had higher plant height and larger leaf area index, while under high watering condition, the positive effects were limited. Under both water condition, the fresh and dry weight of over ground part increased as N-fertilizer application increased, while its water contend, stem diameter and SPAD litter varied. Besides, higher N-fertilizer amount was beneficial to get longer ear, larger diameter, and more seeds, also was likely to got higher yield. The yield of high N-fertilizer amount under low and high watering condition were 13.0 and 13.7 t/hm2 respectively, 20.4% and 17.1% higher than the yield of low N-fertilizer amount treatments.【Conclusion】In Aeolian sandy soil, higher N-fertilizer amount would be conducive plant growth and yield, especially when irrigation water was limited. Therefore, according to the experiment, N-fertilizer amount of 300 kg/hm2 was recommended in Aeolian sandy soil of northwest Liaoning. |
| Key words: N-fertilizer; drip irrigation; aeolian sandy soil; corn; yield |
