包覆尿素和成型尿素对尼泊尔兰普尔水稻产量和氮素利用效率的影响

S. Marahatta
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引用次数: 0

摘要

氮是制约水稻生长和产量的主要因素之一。然而,常规尿素的不平衡使用导致稻田氮素流失,降低氮素利用效率,增加环境污染和种植成本。研究了聚合物包膜尿素(PCU)和尿素型煤(UB)对砂壤土水稻产量和氮素利用效率(NUE)的影响。试验于2018年雨季在农林大学农学研究农场进行,采用随机完全区组设计,每个处理3个重复(T1 -对照,0 kg N ha-1;T2-打孔尿素,150 kg N ha-1单次施用;T3-造粒尿素,150 kg N ha-1标准分施;T4-PCU,基础单次施用150 kg N ha-1;T5-UB, 150 kg N - ha-1单次施用于基部)。利用R studio对产量、氮肥利用率等数据进行记录和分析。计算了不同类型尿素的物理和经济最大氮用量。与单施打孔尿素(3698 kg hm -1)相比,标准分施打孔尿素(4747 kg hm -1)、单施PCU (5183 kg hm -1)和BU (4787 kg hm -1)的水稻籽粒产量和氮肥利用效率显著提高。单次施用PCU (124 kg N ha-1)比标准分次施用造粒尿素(167 kg N ha-1)的最大经济施氮量大大降低。即使在砂壤土中,单施PCU和UB也可作为水稻的替代氮肥。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of coated and briquette urea on yield and nitrogen use efficiency of rice at Rampur, Chitwan, Nepal
Nitrogen is one of the most limiting element for the growth and yield of rice. However, the imbalance use of conventional urea leads to loss of nitrogen from rice field, decrease nitrogen use efficiency, increase environmental pollution and cost of cultivation. This study was done to evaluate the response of polymer coated urea (PCU) and urea briquette (UB) on the yield and nitrogen use efficiencies (NUE) of rice on a sandy loam soil. The experiment was conducted at the agronomy research farm of Agriculture and Forestry University during the rainy season of 2018 in a randomized complete block design with three replications for each treatment (T1 - control, 0 kg N ha-1; T2- Prilled urea, 150 kg N ha-1 single application at basal; T3- Prilled urea, 150 kg N ha-1 standard split application; T4-PCU, 150 kg N ha-1 single application at basal; T5-UB, 150 kg N ha-1 single application at basal). The data on yield, and NUE were recorded and analyzed by using R studio. The physical and economic maximum dose of Nitrogen for these different types of urea were also calculated. Compared with single application of Prilled urea (3698 kg ha-1), rice fertilized with Prilled urea with standard split application (4747 kg ha-1), single application of PCU (5183 kg ha-1) and BU (4787 kg ha-1) had significantly higher grain yield and NUE. Economic maximum dose of nitrogen was reduced greatly for the single application of PCU (124 kg N ha-1) compared to Prilled urea with standard split application (167 kg N ha-1). Single application of PCU and UB can be considered as an alternative nitrogen fertilizer for rice even in the sandy loam soil.
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