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- Title
施氮量和机插密度对钵苗机插杂交籼稻C两优华占 产量和氮素利用效率的影响
- Authors
管正策; 冯跃华; 许桂玲; 黄佑岗; 张佳凤; 牟桂婷; 欧达; 王玲莉; 苏卫
- Abstract
【Objective】The aim of this experiment was to ascertain the effects of different nitrogen(N)rate and densities on rice yield and N use efficiency in indica hybrid rice with bowl mechanical-transplanting,and provide theoretical basis for selecting suitable N application rate and planting density in bowl mechanical-transplanting rice production.【Method 】Under the field experiment conditions,three density levels(216,500 hole/ha,168,400 hole/ha and 126,300 hole/ha) and four N rate levels(0,75,150 and 225 kg/ha)were set up using split panel design. The yield and yield components of rice with bowl mechanical-transplanting method under different densities and N application rates,dry matter accumulation, N accumulation in various organs during main growth period,and N use efficiency were measured and calculated. 【Result】With the increase of N application rate,the N requirement for 100 kg grains(NRG)showed an upward trend, while the fertilizer-N recovery efficiency(FRE),fertilizer-N physiological efficiency(FPE),partial factor productivity of applied N(PFP),N grain production efficiency(NGPE),N dry matter production efficiency(NDMPE)showed opposite trend,yield increased first and then decreased. With the decrease of planting density,FRE,FPE,PFP,NGPE and NDMPE
- Publication
Journal of Southern Agriculture, 2018, Vol 49, Issue 8, p1498
- ISSN
2095-1191
- Publication type
Article
- DOI
10.3969/j.issn.2095-1191.2018.08.05