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为探明不同浓度土壤复合盐胁迫对水稻生长发育、产量和品质的影响,利用盆栽的方式人为设置不同浓度土壤含盐量(0.05%、0.1%、0.2%、0.3%、0.4%),采用单因素随机区组试验,研究不同浓度土壤复合盐对水稻产量和品质的效应。结果表明:不同浓度土壤复合盐胁迫对水稻株高无明显影响;0.1%的土壤盐分促进了水稻植株干重、产量、整精米率、恶白粒率、直链淀粉和蛋白质含量的增加;0.2-0.4%的土壤盐分引起了水稻植株干重、产量和整精米率的明显下降,同时造成了稻米中恶白粒率、蛋白质含量的显著提高,但并没有影响直链淀粉的含量。以上试验结果表明,低浓度盐分(0.1%)有利于改善水稻产量和品质,高浓度盐分(0.2-0.4%)易引起水稻减产和品质变劣,建议将土壤盐分含量0.1%作为盐碱地水稻生产的临界盐分指标。本研究结果为建立盐碱地水稻高产优质种植技术提供基础资料。
In order to find out the effect of compound salt stress of different concentrations on the growth, yield and quality of rice, the soil salt content (0.05%, 0.1%, 0.2%, 0.3%, 0.4% Single factor randomized block experiments were conducted to study the effects of different concentrations of soil compound salts on rice yield and quality. The results showed that salt stress had no significant effect on plant height in different concentrations of soil; 0.1% of soil salt promoted the increase of plant dry weight, yield, milled rice rate, amylose content, amylose content and protein content; Soil salt content of -0.4% caused a significant decrease of dry weight, yield and milled rice rate in rice plants, and at the same time resulted in a significant increase of malodor content and protein content in rice, but did not affect amylose content. The above results show that low concentration of salt (0.1%) is beneficial to improve rice yield and quality. High concentration of salt (0.2-0.4%) can easily lead to the decrease of yield and quality of rice. It is suggested that soil salt content 0.1% Critical salt index. The results of this study provide basic information for establishing high-yielding and high-quality rice planting techniques in saline-alkali land.