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- In the experiment. the absorbing rate of soil mineralizable N increased greatly after the elongation stage, it was assumed that the rice had a fertilizer deficiency phenomenon during the later period. 这与水稻在两种水分管理条件下的生长状况和氮在两种情形下的转化特点密切相关。
- Soil mineral N 矿质总氮
- Nitrogen accumulation by non-nodulated soybean (Table 3) measures the amount of mineral N available in the soil. 不结瘤大豆积累的氮素(表3)可以测算出土壤中有效矿质氮的总量。
- Effect of mineral N on legume BNF and yield is a complex issue. 矿质氮对豆类作物生物固氮和产量的影响是一个复杂的问题。
- N mineralization, extractable mineral N or the use of a non-fixing legume or grass to measure available N supply are useful tools to account for the soil N variable. 氮矿化、可浸提的矿质氮以及利用不固氮的豆类植物或禾本科来测量氮供应均是解释土壤N变量的有用手段。
- Generally, increasing mineral N available to legumes reduces N derived from BNF without enhancing yield appreciably. 一般来,说对豆类作物增加矿质氮的提供会减少生物固氮量而并不能明显提高产量。
- This effect of mineral N assumes there is adequate numbers of effective rhizobia available to the crop to maximize BNF. 矿质氮的这种效果是假定有大量的有效根瘤菌可使作物的生物固氮达到最大。
- Raison R J, Connell M J and Khanna P K.Methodology for studying fluxes of soil mineral -N in situ [J].Soil Bio. 田昆常凤来莫剑锋陆梅杨永兴.;原状土就地培养取样法定位研究田间土壤氮动态变化[J]
- Some reports indicate reduction of legume BNF by mineral N is dependent on host species and form of N available. 一些报告还指出,通过矿质氮引起的豆类作物生物固氮的减少与寄主品种和有效氮的形态有关。
- Recommendations for starter N originate from our knowledge of the legume's physiological dependence on mineral N prior to onset of BNF. 对豆类作物推荐施种肥是因为我们知道在出现生物固氮之前豆科植株对矿质氮有生理依赖。
- This section provides basic information on how N affects legume BNF processes and under what conditions legumes respond to mineral N. 这部分介绍氮如何影响豆科生物固氮过程以及在什么样的条件下豆类作物对矿质氮有反应。
- It is believed that legume farmers in China could save much of the estimated 2,632 million RMB spent every year on mineral N by inoculating their crops with Rhizobium. 据估计,中国若用根瘤菌接种豆类作物替代氮肥,每年可节约花在氮肥上的资金2.;682亿元的大部分。
- Preferably, the plus N treatment should also be inoculated to ensure that yield increase is due to mineral N effects beyond that obtainable with sufficient rhizobia. 对氮处理若能接种则更好,这样就进一步明确增产中超过足量根瘤菌可获得产量水平以上的是矿质氮素的作用。
- Bonde A T,Schniirer J,Rosswall T.Microbial biomass as a fraction of potentially mineralizable N in soil from long-term field experiments[J].Soil Biol.Biochem.,1988,20 (4):447-452. 王淑平周广胜等.;土壤微生物量氮的动态及其生物有效性研究[J]
- Many factors, such as apple cultivar, fruit maturity and size, temperature, the cultivated conditions, soil mineral content, storage condition, can affect the severity of apple watercore. 品种、果实成熟度、温度、栽培条件、果实大小、矿质营养、贮藏条件等因素影响苹果水心病的发生。
- The problem of extracting potential mineralizable N in calcareous soil by boiling KCI and its improvement[J].Acta Univ.Agric.Boreali-occident.,1992,20(1):11-16. KCl煮沸法浸取石灰性土壤可矿化氮存在问题及改进[J].;西北农业大学学报;1992;20(1):11-16
- Long-term fertilizer application effects soil organic carbon (C), total N and potentially mineralizable N in continuous wheat cropping systems in western Canada. 表6 加拿大西部小麦连作体系中长期施肥对土壤有机碳(C)、全N和潜在可矿化氮的影响 Table 6.
- Bonder A T, Schniirer J, Rosswall T. Microbial biomass as a fraction of potentially mineralizable N in soil from long-term field experiments[ J]. Soil Sci. Biochem., 1988,20(4) : 447-452. 王淑平周广胜等.;土壤微生物量氮的动态及其生物有效性研究[J]
- The mineralizable N was estimated by aerobic incubation and the organic N components by Bremner's procedure. 结果表明,酸解氮与可矿化氮有较密切的正相关关系。
- Some plants push their roots deep into the soil. 一些植物的根深深长入土中。