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长期垄作稻田腐殖质稳定碳同位素丰度(δ13C)分布特征
垄作 有机质 腐殖质 稳定碳同位素丰度（δ13C） 稻田
2011/10/31
研究了四川盆地丘陵区连续16年垄（宽垄）作稻田土壤稳定碳库腐殖质组分的稳定碳同位素(δ13C)分布特征.结果表明： 稻田土壤有机碳含量为宽垄作＞垄作＞水旱轮作.腐殖质碳以胡敏素为主，占土壤碳含量的21%～30%，提取碳以胡敏酸为主，分别占土壤有机碳和腐殖质的17%～21%和38%～65%.土壤有机碳的δ13C值介于-27.9‰～-25.6‰，20～40 cm和0～5 cm土壤有机碳δ13C值之差约...
主枝开张角度对盆栽红富士苹果 13C和 15N分配、利用的影响
红富士苹果 13C 15N分配 利用
2012/3/26
以3年生盆栽红富士苹果 (Malus domestica Borkh.cv. Red Fuji)/平邑甜茶 (Malus hupehensis)为试材，研究了主枝开张角度对盆栽红富士苹果对13C分配及15N-尿素分配、利用的影响。结果表明，根系13C分配率随主枝开张角度的增大而减少，在秋梢生长期对照、枝条水平和枝条下垂3处理根系的13C分配率分别为46.39%、36.39%和26.73%；而叶片1...
Root Growth and Partitioning of 13C-labelled Photosynthate in the Seminal Root of Corn Seedlings as Affected by Light Intensity
Carbon partitioning Light intensity Root growrth Root system Zea mays L.
2009/8/4
The effects of shading on growth and allocation pattern of photosynthate in the seminal root of corn seedlings were studied using 13C as a tracer. Corn seedlings, preshaded for 2 days (light intensity...
Studies on the Effect of the Relative Humidity of the Atmosphere on the Growth and Physiology of Rice Plants : X. Effect of ambient humidity on the translocation of assimilated 13C in leaves
Photosynthetic product Relative humidity Rice Translocation
2009/7/27
^<13>C-labelled CO2 was fed to rice seedlings for 60 min in the light under low (60%) or high (90%) humidity. The amount of 13C assimilated by the leaves under high humidity was much greater than that...
Studies on the Effect of the Relative Humidity of the Atmosphere on the Growth and Physiology of Rice Plants : Effects of ambient humidity in the dark period on the growth and the translocation of 13C-labelled photosynthetic products
13CO2 feeding study Photosynthetic product Relative humidity Rice Translocation
2009/7/21
Rice seedlings(age in leaf number of 3)were grown for 10 days at 75% relative humidity in the light period(12-hr)and at 60, 75, or 90% humidity in the dark period(12-hr)Dry matter production of the pl...
Partitioning of 13C-labeled Photosynthate in Eddoe Plants with Special Reference to Source-sink Unit
Carbon partitioning Colocasia esculenta(L.) Schott Daughter tuber Eddoe Mother tuber Source-sink unit
2009/7/14
The partitioning of 13C-labelled photosynthate in eddoe plants(Colocasia esculenta(L.) Schott) was studied. At various stages of development, the whole plants of cv. Uhan were fed with 13CO2.The 13C-l...
玉米生长和光合作用对土壤呼吸δ13C的影响
玉米生长 光合作用 土壤呼吸 δ13C值。
2008/1/2
摘要 在玉米盆栽试验期间，运用碱吸收法采集土壤呼吸样品，转化成碳酸钡后，运用质谱法测定其δ13C值，以研究玉米生长和光合作用对土壤呼吸δ13C值的影响。结果表明，在玉米生长下，土壤呼吸的δ13C值随玉米生长时期而变化，变化在-14.57‰～-12.30‰之间，呈喇叭期>成熟期>开花期，而在裸土下，土壤呼吸的δ13C值在-19.34‰～-19.13‰之间，不随时间发生显著变化。开花期土壤呼吸δ13C...