摘要
以寒地穗数型中晚熟高产品种松粳6号和穗重型晚熟超级稻品种松粳9号为试验材料,在统一施氮量不同施肥方式条件下,比较分析水稻根系形态和活力、茎秆抗倒性状等动态变化,以期为寒地水稻施肥方法提供理论依据。结果表明,在生育前期,随氮肥量增加,根系体积、长度、干重和伤流液量也随之增加。在生育后期,随穗肥施氮量减少,根系体积、长度、干重和伤流液量均先增后减。因此,后期施用较多肥料不利保持根系形态和活力。随基蘖肥施氮量增加,穗肥施氮量减少,第一节间长度呈增加趋势,第二节间长度先升后降,第一节间和第二节间茎秆直径与抗折力均先升后降,产量上也表现相同趋势。因此,适宜基蘖肥和穗肥比例可显著提高水稻根系活力和茎秆抗折力,提高水稻产量。
Two varieties grown in cold region were used in this experiment, multi-panicle type and mid-late maturity and high-yield cultivar（Songjing6） and heavy panicle type and super high-yield and late maturity cultivar（Songjing9）. On the basis of identical nitrogen application with different application treatments, the dynamic variation of rice root morphology, vigor and stalk lodging resistance was investigated to provide theoretical basis for fertilization of rice plant in cold area. The results showed that in the early growth stage, the volume, length, dry weight, and bleeding sag of root increased with the increase of the nitrogen application. The volume, length, dry weight, and bleeding sag of root first increased and then decreased with the decrease of the nitrogen application in the late growth stage. Therefore, nitrogenapplication at late stage was not conducive to more root morphology and vigor. Moreover, with the increase of base and tiller fertilizers, decrease of panicle fertilizer, the length of the first intemode increased continuously, the length of the second intemode increased first and then decreased, so did the stem diameter, bending forces and yield. Taken together, appropriate base-tiller and panicle fertilizers significantly increased bending forces and improved rice yield.
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2016年第12期1-7,共7页
Journal of Northeast Agricultural University
基金
科技部"十三五"科技支撑计划项目(2015BAD23B05-11)
东北农业大学学科团队建设项目
黑龙江省粮食产能提升协同创新中心项目
关键词
氮素营养
水稻
根系
抗倒性
nitrogen nutrition
rice
root
lodging resistance
