摘要
以引种早、中、晚稻各4个品种和1个当地品种为材料,通过田间试验对江西季节性干旱区节水灌溉条件下水稻水分利用效率、产量及品质进行了对比分析。结果表明,在早稻、中稻、晚稻节约用水分别达10%、28%、26%条件下,与其对照相比,引种早稻品种中旱27、中稻品种武运粳7号和两优培九、晚稻品种农香16和中香1号具有较高的经济与生态效益,在该区具有广阔的推广前景。节水灌溉对中稻与晚稻的生长和稻米品质的影响表现出一致性。与常规灌溉模式相比,节水灌溉下虽然水稻有效穗降低,有的甚至达到显著差异,但是每穗颖花数、结实率和千粒重的增加弥补了有效穗降低不足,因此产量变化未达到显著差异。节水灌溉条件下糙米率、精米率、整精米率、胶稠度、碱消值、直链淀粉等性状提高,而垩白率、垩白度、蛋白含量降低和稻米粒型变小。
The biological characteristics of introducing rice cultivars under condition of water-saving and effects of water-saving irrigation on rice growth and grain quality were studied by using 12 introduced rice cultivar and 3 local rice cultivar as material in the seasonal dry hilly regions of southern China. The results showed the early rice, mid-season rice and late rice was under the condition of 10%, 28%, and 26% water-saving respectively, the introduced early rice cultivar Zhanghan 27, mid-season rice cultivar Liangyoupeijiu and Wuyunjing 7, late rice cultivar Nongxiang 16 and Zhongxiang 1 has higher economic benefit and ecological benefit, and has a bright prospect of extension in the region. The effective panicle number and plant length in water-saving irrigation was lower than that in common irrigation, but the spikelet length, No. of spikelet per plant, seed setting rate and 1000-grain weight in water-saving was higher than that in common irrigation. Among which effects of water-saving irrigation on the effective panicle number, plant length and No. of spikelet per plant had notable discrepancy in some rice cultivars. Compared with the common irrigation, the brown rice rate, milled rice rate, head rice rate, gel consistency, amylose content and alkali-spreading value was increased, but length/width, chalky grain rate and chalkines was decreased. Therefore the rice grain quality could be improved in water-saving irrigation.
出处
《干旱地区农业研究》
CSCD
北大核心
2007年第6期45-51,56,共8页
Agricultural Research in the Arid Areas
基金
国家高新技术研究发展计划(2002AA2Z4331)
