摘要
本研究以北方粳稻为材料,采用盆栽试验,研究了在轻度镉污染土壤中施用不同量炭对水稻生长发育及其净光合速率的影响。结果表明:在镉污染土壤中施用炭能够提高光合速率,增加干物质积累,提高产量,对水稻生长具有较大的促进作用。在水稻生长发育前期,不同施炭量处理对水稻茎、叶等干物质积累影响不显著,但至水稻抽穗期以后,这种影响初步显现,各不同施炭量处理均与对照(CK)有较大差异,表现为茎、叶、穗干物质增加,且在完熟期C1处理与其它处理均差异显著;不同施炭量处理对水稻净光合速率影响显著,各处理在不同发育时期均与对照有显著差异,在灌浆期以后,水稻净光合速率与蒸腾速率的提高,可促进水稻的物质积累与籽粒成熟,增加千粒重,提高结实率;在最终产量形成上,C1与C2处理均与对照达到极显著差异,分别比对照提高产量18.4%和2.92%。
The effects of crop-residue-derived charcoal amendment on north Japonica rice growth and photosynthetic rate in a slightly polluted paddy soil of cadmium （Cd） were studied by pot experiment. The results showed that charcoal amendment in the Cd-polluted soil could promote the rice growth, in detail, increase the photosynthetic rate and dry matter accumulation as well as the grain yield. Although there were no significant differences in dry material of rice stems and leaves among different treatments in the early growing stages of rice, the effect of charcoal amendment appeared compared with control （CK, no charcoal） after the heading date. Dry matter of rice stems, leaves and panicles were in- creased by charcoal amendment, and in particular, they had significant differences between C1 （11 250 kg charcoal ha-1） and CK treatments in the maturing stage. Charcoal amendment in Cd-polluted soil has significant effect on the photosynthetic rate of rice at the whole growing period. The high Photosynthetic and Transpiration rate of rice could increase matter accumulation as well as 1000-grain weight and seed setting rate after the filling date and could also accelerate the maturity of grain. Compared with CK, C1 and C2 （22 500 kg charcoal ha-1） increased the yields by 18.4% and 2.92%, respectively.
出处
《北方水稻》
CAS
2009年第2期4-7,11,共5页
North Rice
基金
国家自然科学基金(40701090)
中央级公益性科研院所基本科研业务费专项
关键词
水稻
镉
秸秆炭
净光合速率
Rice
Cadmium
Crop-residue-derived charcoal
Photosynthetic rate
