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【目的】检验水稻定量促控栽培技术(RP)的适应性,并探索其增产机理。【方法】于2008—2009年在云南省6个生态区,以当地的主栽品种为材料,设置RP技术与常规栽培技术的对比试验,调查叶龄、茎蘖数、产量及其构成因素。【结果】在6个生态区RP技术显著增产,2008年籼、粳稻分别增产16.0%和15.8%;2009年分别增产18.3%和15.3%;与常规栽培技术相比,RP技术增加穗肥的用量促进了颖花的分化并降低了颖花的退化,从而促进大穗的形成,提高了穗粒数。【结论】RP技术通过降低基本苗和高峰苗提高茎蘖成穗率,获得更多的有效穗,通过重施穗肥促进大穗的形成,显著扩大库容量,最终获得高产。基于此提出了不同生态区12 t.hm-2水稻高产的群体指标。
【Objective】 The objective of this study was to test the adaptability of quantitative-controlled cultivation techniques (RP) in rice and to explore its mechanism of yield increase. 【Method】 The comparative experiments between RP technology and conventional cultivation techniques were conducted in six ecotopes of Yunnan Province from 2008 to 2009 using the local cultivars as materials. Leaf age, tiller number, yield and its components were investigated. 【Result】 RP technology was significantly increased in six ecoregions. In 2008, indica and japonica yield increased by 16.0% and 15.8% respectively, and increased by 18.3% and 15.3% respectively in 2009. Compared with conventional cultivation techniques, RP technology increased the amount of panicle fertilizer Promote the differentiation of spikelets and reduce the degradation of spikelets, thus promoting the formation of big ears and increasing the number of grains per spike. 【Conclusion】 RP can increase the tillering rate of stems and tillers and lower the number of spikelets, increase the number of effective spikes, and promote the formation of big spikes by re-applying the panicle fertilizer, significantly increase the storage capacity and finally obtain high yield. Based on this, the population index of 12 t.hm-2 high-yielding rice in different ecological regions was proposed.