摘要
通过对五优157和五优21进行不同栽插密度处理,研究赣南中低产田区双季早稻适宜栽插密度。结果表明：随栽插密度增加,早稻有效穗数和产量增加较为明显。栽插密度13.3 cm×20.0 cm处理与13.3 cm×30.0 cm处理相比,有效穗数提高21.7%,产量增加10.6%。较高栽插密度处理,有利于抽穗期后的剑叶光合速率、SPAD值和叶面积指数保持在较高水平,从而增强抽穗后的叶片光合生产能力,提高全生育期干物质生产量,特别是抽穗-成熟期穗部干物质的积累量。该区适宜栽插密度为32.1万-37.5万蔸/hm^2。
The double-cropping early rice varieties Wuyou 157 and Wuyou 21 were planted at different densities in middle -yielding and low-yielding fields of southern Jiangxi province , and their appropriate planting densities were studied .The results showed that：along with the increase in planting density , the effective panicle number and yield of early -season rice increased obvi-ously.In comparison with the treatment of planting density 13.3 cm ×30.0 cm, the treatment of planting density 13.3 cm ×20.0 cm enhanced the effective panicle number and yield by 21.7% and 10.6% respectively.The higher planting density treatments were conducive to keeping higher level of photosynthetic rate , SPAD value and leaf area index of flag leaf after heading stage , thus strengthening the photosynthetic production capacity of flag leaf after heading , and enhancing the dry matter production and accumu-lation at whole growth stage , especially the accumulation of dry matter in the spikes from heading stage to maturation stage .The ap-propriate planting density in this area was 321000-375000 clumps per hectare .
出处
《江西农业学报》
CAS
2014年第12期21-23,27,共4页
Acta Agriculturae Jiangxi
基金
院创新基金"稻草还田对双季晚稻苗期生长抑制的影响研究"(2011CQN008)
长江中游南部(江西)双季稻持续丰产技术集成创新与示范(2011BAD16B04)
江西双季稻大面积均衡增产技术集成研究与示范(2012BAD04B11)
关键词
栽插密度
双季早稻
中低产田
Planting density
Double-cropping early rice
Middle-yielding and low-yielding field
