evaculate
发表于 2025-3-25 06:18:22
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Cardiac-Output
发表于 2025-3-25 08:20:23
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宽度
发表于 2025-3-25 12:20:09
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Abbreviate
发表于 2025-3-25 16:30:39
Reappraisal of the significance of ammonia volatilization as an N loss mechanism in flooded rice fio not disturb the field environment. This paper summarizes methodologies used in this research and discusses findings from recently conducted micrometeorological studies on ammonia volatilization. Factors affecting ammonia loss and the contribution of this process to the overall nitrogen loss from l
sundowning
发表于 2025-3-26 00:01:47
Denitrification losses in flooded rice fields,conditions prevailing in flooded rice soils alter the rate at which these processes occur. The key N transformations in a flooded soil system include (1) mineralization of organic N; (2) nitrification of NH.; (3) NH. volatilization; (4) denitrification; and (5) N. fixation (Figures la, b). Agronomic
杂役
发表于 2025-3-26 00:18:34
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迷住
发表于 2025-3-26 05:25:27
The efficacy and loss of fertilizer N in lowland rice,s greatly increased the prospect of increasing yields, but this goal will not be reached without great increases in the use and efficiency of N on rice. Nitrogen enters a unique environment in flooded soils, in which losses of fertilizer N and mechanisms of losses vary greatly from those in upland s
针叶树
发表于 2025-3-26 09:56:09
New developments in nitrogen fertilizers for rice, to rice-growing countries. The development of new N fertilizers is best achieved by following a logical sequence of testing and evaluation procedures in a variety of settings from the laboratory to the farmer’s field. Novel N fertilizers currently at various stages of testing include urea supergran
讨好女人
发表于 2025-3-26 15:28:08
Improving nitrogen fertilization in mechanized rice culture, relative to N source and time of application differs in the two systems because of the timing of soil submergence which influences N retention in the soil. Nitrogen management studies show that N fertilizer efficiency is maximized in water-seeded rice when ammonical N is placed 5 to 10 cm in the so
唠叨
发表于 2025-3-26 17:37:31
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