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p示踪
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  p tracer
    Study on the Effect of Humic Acid on Absorption and Transportation of Phosphate in Wheat By Using 32P Tracer Method
    用~(32)P示踪法研究腐植酸对小麦吸收及转移磷的增效作用
短句来源
    THE RELATIONSHIP BETWEEN GROWTH AND DEVELOPMENT OF ABOVE GROUND ORGANS WITH ROOTS OF WINTER WHEAT USING 32 P TRACER
    冬小麦生长发育与根系关系的~(32)P示踪研究
短句来源
    Using the two-line Japonica hybrid rice Ejingza 1 as the experimental material,effects of different concentrations(10 mg/L,30 mg/L,50 mg/L) of 5Aminolevulinic acid(ALA) applied at initial heading stage on the phosphate uptake and distribution in rice were studied using~(32)P tracer method.
    以两系杂交粳稻鄂粳杂1号为材料,应用32P示踪技术比较研究了在始穗期喷施不同浓度(10 mg/L3、0 mg/L、50 mg/L)的5-氨基酮戊酸(5-Aminolevulinic acid,ALA)对水稻植株中32P吸收与分配的影响。
短句来源
    The root activity, phosphorus distribution and plumpness of two line intersubspecific hybrid rice were studied with the aid of 32 P tracer technique.
    应用放射性32P示踪技术对两系亚种间杂交稻根系活力、磷素分配与籽粒充实度进行了研究。
短句来源
    The relationship of growth and development between above ground organs and roots of winter wheat, Lumai 14, was studied using 32 P tracer. The results showed that before the spike formation, dry matter accumulation in roots, stems and leaves were synchronous, and after that they were asynchronous.
    利用32P示踪技术,研究了冬小麦地上部生长发育与根系的相关性,结果表明:孕穗前,根、茎、叶干重的累积是同步的,孕穗后为异步。
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    Study on the Metabolism of 32 P-phosphate in Maize Small Season
    利用~(32)P示踪研究玉米苗期的磷素代谢
短句来源
    Study on nutrient absorption and metabolism of Hubei's new wheat varieties(lines) in late growing stages by using 32P tracers
    湖北省小麦新品种(系)生育后期养分吸收与代谢规律的~(32)P示踪研究
短句来源
    Study of Phosphate Absorption and Distribution Characteristics in Flue-cured Tobacco at Seedling bed by Using ~(32)P
    应用~(32)P示踪研究烤烟苗床期对磷素营养的吸收与分布
短句来源
    Study of phosphate Absorption and Distribution Characteristicsin Flue-cured Tobacca by Using ~(32)P
    应用~(32)P示踪研究烤烟对磷素营养的吸收与分布
短句来源
    Study of Phosphate Absorption and Distribution Characteristics in Potato by Using ~(32)P
    利用~(32)P示踪研究马铃薯(合作-88)对磷素营养的吸收及分布规律
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  p tracer
The penetrating root hairs grew for 2 and 4 days in soil labelled with radioisotope phosphorus (P) tracer 32P (185 kBq g-1 dry soil) filled in another PVC tube.
      
A 32P tracer placed at a depth of 12.5, 37.5, 62.5 or 87.5 cm was employed to determine root system dynamics by sampling crop leaves at 0, 15, 30 and 45 cm lateral distance.
      
Using a 32P tracer, mosses removed from plots receiving PK in combination with NH4 maintained their affinity for increased phosphorus uptake.
      


The ~(15)N,~(32)P radiolabelled study proved that the differences of N,Pelements by millet plant in milking stage were significant among variousvarieties.In late variety“Japan 60-day”and its filial generations theamount of absoring capacity was quite large,but the translocation velo-city towards the ear was slow.The early variety “Xinnong 761”showedlower absorbing capacity,but the translocation velocity towards the earwas fast.And this characteristic can be transmited to the filial genera-tions.The translocation...

The ~(15)N,~(32)P radiolabelled study proved that the differences of N,Pelements by millet plant in milking stage were significant among variousvarieties.In late variety“Japan 60-day”and its filial generations theamount of absoring capacity was quite large,but the translocation velo-city towards the ear was slow.The early variety “Xinnong 761”showedlower absorbing capacity,but the translocation velocity towards the earwas fast.And this characteristic can be transmited to the filial genera-tions.The translocation velocity of tracers ~(15)N,~(32)P towarde the ear hadno correlation with the temperature change,but it had positive correla-tion with the accumulation velocity of dry matter in the ear.Under theconditions of higher contents of effective N,P in the soil the top appli-cation of N,P fertilizers to millet plant before heading didn't promotethe increase of output signally.

用同位素~(15)N、~(32)P 示踪研究证明,谷子灌浆阶段植株对 N、P 元素的吸收量各品种之间有较大的差异,多花晚熟型品种日本60日谷及其杂交后代吸收量较大,但向穗部的运转速度较慢;早熟型新农761谷吸收量虽少,而向穗部运转快,并且这种特性可以遗传给其杂交后代;示踪~(15)N、~(32)P 向穗部的运转速度与当时的气温变化没有相关性,与穗部干物质积累速度呈正相关,在土壤有效N、P 含量较高的条件下,谷子抽穗前追施 N、P 肥料增产作用不大。

The technique for radioisotope ~(32)P-labelled phosphate was used to study the rule of uptake, transmission and distribution of phosphorous in strawberry (Fragaria X ananassa) plants during a year's cycle. The experiment showed that the strawberry plant has a special characteristic which is different from other types of fruit in the special phase during a year's cycle in the uptake, transmission and distribution of phosphorus. The theoretical fertilizing period and other managements for the strawberry plant...

The technique for radioisotope ~(32)P-labelled phosphate was used to study the rule of uptake, transmission and distribution of phosphorous in strawberry (Fragaria X ananassa) plants during a year's cycle. The experiment showed that the strawberry plant has a special characteristic which is different from other types of fruit in the special phase during a year's cycle in the uptake, transmission and distribution of phosphorus. The theoretical fertilizing period and other managements for the strawberry plant were put forward on the basis of the experimental results.

作者利用放射性核素~(32)P示踪技术,研究了年周期中不同生长发育时期草莓(Fragaria x ananassa)对磷素营养的吸收、运转和分配规律。实验结果表明:草莓对磷元素的吸收、运转和分配特点既有别于其他果树,又与它们有相似的规律。草莓的地上部分和地下部分对~(32)P的吸收呈2次既同步又相交错的吸收高峰。在返青前期、开花前后、果实膨大期和花芽分化时及时追肥,是草莓获得优质高产的必要措施之一。根据试验结果,还对草莓管理中去除匍匐茎,做好冬前防寒保叶等技术措施的必要性作了理论上的探讨。

Studies on the effects of emasculation and seed production of hybrid rice had been conducted by male-gametocide No.1 and No.2 (MG1 and MG2) in 1986-1988. The results showed that:

通过1986~1988年三年对杀雄剂1号和杀雄剂2号在水稻杀雄、制种上效应的研究,得出以下结果:(1)在水稻花粉充实期喷施0.015~0.02%的杀雄剂1号,能使87个参试品种的平均自交结实率降到0.7~3.3%,有72%的品种达到化杀制种要求;(2)两种杀雄剂的田间化杀制种效果无显著差异;(3)现有杀雄剂和施用方法不能克服化杀制种中产量与种子纯度呈显著负相关(r=-0.61,P<0.01)的矛盾;(4)~(32)P示踪试验揭示出杀雄剂在诱导水稻产生生理性雄性不育的同时,亦严重干扰了雌性器官的磷代谢,导致雌蕊受精结实能力降低;(5)影响水稻化学杀雄制种的主要限制因素是现有杀雄剂对雄、雌蕊的生理损伤缺乏选择性所致。

 
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