This study was carried out to verify the applicability of variable rate fertilization (VRF) based on soil testing and diagnosis of rice plant growth for high quality rice production of var. Chucheongbyeo at the farm level. The field trials were conducted at Icheon in Gyeonggi province on a 10 ha farm consisting of 45 experimental fields. For comparative study, 15 field trials were carried out adopting fertilizer management (FPM) practices currently used by farmers. FPM fields were managed by each rice grower using current cultivation methods, but in each VRF field fertilizer application was prescribed using soil test results and the amount of N fertilizer for top-dressing at panicle initiation stage was calculated using rice growth value at that stage. In VRF fields, the total amount of N fertilizer application was less (72 kg ha-1) than that in FPM fields (103 kg ha-1). However, the amount of K2O ertilizer application was more in VRF fields (60 kg ha-1) than that in FPM fields (52 kg ha-1). The amount of P2O5 fertilizer application was similar between the VRF and FPM fields. Plant height was significantly shorter and the number of tillers was significantly more at VRF fields than at the FPM fields. Coefficient of variation (CV) of each growth characteristic measured in VRF was lower than that of FPM fields at panicle initiation stage. There was no difference in culm and panicle length and panicle number between them at the grain filling stage, but CV of panicle numbers per m2 decreased in VRF compared with that of the FPM fields. Rice yield was not different between VRF and FPM fields despite higher brown rice recovery and 1,000-grain weight in VRF fields. Under VRF management, head rice yield increased due to an increase in head rice ratio accompanied by a reduction in brown rice protein content and variation of quality characteristics. These results suggest that VRF application based on soil tests and measurement of rice growth value at panicle initiation stage has the potential for quality control and production of high quality rice through increasing uniformity of growth and reducing the variability in quality among individual fields.
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机译:本研究旨在通过土壤测试和水稻植物生长的诊断来验证可变速率施肥(VRF)在高品质水稻生产中的适用性。农场级别的Chucheongbyeo。田间试验在京畿道利川市的一个10公顷农场进行,该农场由45个试验田组成。为了进行比较研究,采用了农民目前使用的肥料管理(FPM)方式进行了15个田间试验。 FPM田地由每个水稻种植者使用当前的耕作方法进行管理,但在每个VRF田地中,均根据土壤测试结果规定施肥量,并使用该阶段的水稻生长值计算出穗始生期追肥的氮肥用量。在VRF田间,施用的氮肥总量(72 kg ha-1)少于FPM田间(103 kg ha-1)。但是,VRF田(60 kg ha-1)比FPM田(52 kg ha-1)施用的K2O施肥量更多。在VRF和FPM田间,P2O5肥料的施用量相似。与FPM田相比,VRF田的株高显着缩短,分till数明显增加。在穗开始阶段,在VRF中测得的每个生长特征的变异系数(CV)低于FPM场。籽粒灌浆期茎秆和穗长以及穗数之间没有差异,但与FPM田相比,VRF中每平方米穗数的CV降低。尽管VRF田和FPM田的水稻产量没有差异,但VRF田的糙米回收率更高且重达1000粒。在VRF管理下,由于糙米比例的增加,同时糙米蛋白质含量的降低和质量特性的变化,糙米产量也有所增加。这些结果表明,基于土壤试验和穗萌芽期水稻生长值测量的VRF应用通过增加生长的均匀性和减少各个田间质量的变异性,有可能进行质量控制和生产优质水稻。
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