摘要
以番茄的果穗和果穗下的3片叶及其相应的茎作为一个源库生长单位,对不同茬口日光温室番茄的干物质生产与分配规律进行了研究。结果表明:植株在前7穗果同时存在的情况下,从下到上不同源库生长单位内果实所分配到的比例在42.6%～98.6%之间,即随着果穗数从下而上的不断增加,每产生一穗果实,各源库生长单位果实的干物质分配率下降约6%。不同茬口日光温室番茄受外界环境影响显著,干物质生产表现出明显的季节性差异,果实干物质分配率在越冬茬、早春茬和春夏茬分别为72%、62%和59%,春夏茬果实干物质分配率最低,这与其生长后期遭遇高温,坐果率降低有关;越冬茬生长前期100d的干物质积累量只有后100d的1/3,与其生长期内低温弱光有关。
In this study, a source-sink growth unit, which composed of a fruit truss, three pieces of leaves just below this truss and the corresponding stem, was adopted for understanding the dry matter production of tomato crop in three different planting time： over-winter cultivation planted in Oct. 26 （OW） ; early-spring cultivation in Feb. 17 （ES） and spring-summer cultivation in Mar. 29 （SS）, respectively. The results showed that within a source-sink growth unit, fruit dry matter distribution was between 42. 6% and 98.6%. Fruit dry matter distribution decreased by 6% with the increasing of the fruit truss number （the lowest fruit truss is the first truss）, supposing the seven fruit trusses simultaneously existed in the same plant. When ripe fruits were picked, the distribution of immature fruit dry matter was increased due to the increase of the fruit sink strength. Dry matter production in different cultivation varied a lot due to the obviously different greenhouse climate. The ratio of fruit dry matter to shoot dry production were 72%, 62% and 59% for OW, ES and SS cultivation, respectively. Fruit dry matter distribution of SS cultivation was lower than the other two treatments due to the lower rate of fruit-set, when facing high temperature in summer season. The accumulated dry mass in first 100 days after planting was only 1/3 of that in the later growing 100 days in OW cultivation, which was related to low temperature and low light intensity.
出处
《园艺学报》
CAS
CSCD
北大核心
2007年第6期1437-1442,共6页
Acta Horticulturae Sinica
基金
农业部‘948’项目(2003-Z64)
国家留学基金项目(教外司留[2001]498)
关键词
番茄
日光温室
茬口
干物质生产
干物质分配
源库生长单位
Tomato
Solar greenhouse
Crops
Dry matter production
Dry matter distribution
Sourcesink growth unit
