论文部分内容阅读
以9个杂交水稻组合为材料,在无氮肥和施氮肥(225 kg/hm2纯N)2种条件下研究氮肥对杂交水稻产量及产量性状的影响。结果表明,不同品种对氮肥的敏感性不同,Y两优1号、准两优527、冈优725、云光14、两优培九、Ⅱ优838、云优1981施氮肥后产量增加达显著水平,两优2186、云优1973施氮肥后增产未达显著水平。相关分析表明:无氮肥条件下,单株有效穗与产量极显著正相关;施氮条件下,单株有效穗、结实率与产量显著正相关。通径分析表明:在无氮肥条件下,单株有效穗和每穗实粒数对产量的贡献最大,应依靠有效穗和每穗实粒数提高产量;施氮条件下,每穗总粒数对产量的贡献率最大,说明氮肥能促进每穗总粒数增加,从而提高产量。
Nine hybrid rice combinations were used to study the effects of nitrogen fertilizer on yield and yield traits of hybrid rice under nitrogen and nitrogenous fertilizers (225 kg / hm2 pure N). The results showed that the sensitivity of different varieties to nitrogen fertilizer was different, and the yield of Y Liangyou 1, Zhunliangyou 527, Gangyou 725, Yunuang 14, Liangyoupeijiu, Ⅱyou 838 and Yunyou 1981 increased significantly, You 2186, Yunyou 1973 after nitrogen fertilizer production did not reach significant levels. Correlation analysis showed that there was a significant positive correlation between the effective panicles per plant and yield under the condition of no nitrogen fertilizer. Under the nitrogen application conditions, the effective panicles per plant, the seed setting rate and the yield were significantly and positively correlated. Path analysis showed that under the condition of no nitrogen fertilizer, the effective panicle per panicle and the solid grain per panicle had the greatest contribution to the yield, and the yield should be increased by the effective panicles and the real grains per panicle. Under nitrogen application, the total grains per panicle The largest contribution to yield, indicating that nitrogen fertilizer can promote the total number of grains per spike, thereby increasing production.