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利用放射性同位素研究磷肥单施与氮磷配合不同施肥处理的春小麦,各时期吸磷的速度和在植株中的累积量相差显著。氮磷结合(N_2 ~(32)P_1)吸收强度大,速度快,磷的累积量迅速上升。到孕穗期达到高峰,N_2 ~(32)P_1比~(32)P_1多吸收放射性磷将近一倍。植株各器官不论根、茎、叶,穗,凡是氮磷配合放射性强度皆比磷肥单施高。春小麦对肥料吸收量与植株生长量是一致的,即生长量大时,其吸收量也多。磷肥的吸收随春小麦生长中心而转移,小麦前期吸收磷积累在茎、叶中,随生长中心转移不断运往穗部。由于氮磷配合比磷肥单施提高磷肥利用率,因而对小麦生长发育,产量构成影响有显著差异。氮磷配合增加了株高、茎粗、光合面积,提高了叶绿素含量与干物重,增加穗长,小穗数,千粒重与产量。
The use of radioisotopes to study the application of phosphate fertilizer alone and nitrogen and phosphorus fertilizers with different spring wheat, phosphorus uptake rate in each period and the cumulative amount of plants in a significant difference. Nitrogen and phosphorus combined (N_2 ~ (32) P_1) absorption intensity, fast, phosphorus accumulation rapidly increased. Reaching the peak at the booting stage, N_2 ~ (32) P_1 almost doubled the absorption of radioactive phosphorus by ~ (32) P_1. Plant organs regardless of root, stem, leaf, ear, where nitrogen and phosphorus with radioactive intensity higher than phosphate fertilizer alone. Spring wheat absorption of fertilizer and plant growth are the same, that is, when the growth of large, its absorption is also more. The absorption of phosphate fertilizer shifted with the growth of spring wheat, and the absorption of phosphorus accumulated in stems and leaves in early wheat and transported to the ears with the growth center. As nitrogen and phosphorus fertilizer with phosphate fertilizer alone to improve the rate of phosphorus utilization, and thus the growth and yield of wheat, the composition of a significant difference. Nitrogen and phosphorus increased plant height, stem diameter and photosynthetic area, increased chlorophyll content and dry matter weight, increased spike length, spikelet number, 1000-grain weight and yield.