秸秆还田与氮肥管理对水稻养分吸收的影响

在大田条件下，设计2种秸秆还田方式和3个氮肥水平，研究秸秆还田与氮肥管理对水稻养分吸收的影响。结果表明：秸秆还田与实地氮肥管理(SSNM)能提高抽穗和成熟期各器官中N、P、K含量，使得群体源、库进一步协调，增加抽穗期非结构性碳水化合物，减少成熟期茎鞘中NSC(非结构性碳水化合物含量)的残留，促进同化物向籽粒的运转。该文还对不同处理下养分吸收的差异进行了分析。

Effects of straw residue return and nitrogen management on nutrient absorption of rice

Under the field-grown condition, two straw residue and three nitrogen application rates were designed to investigate the remobilization of assimilation and nutrient absorption. The results showed that straw residue return and SSNM(applying nitrogen based on the timing, amount of nitrogen and values of chlorophy11 meter). can increase N, P, K content in different organs at both heading and maturity stages. Likely the relation between source and sink was harmonized under straw residue return and N management. This technique promotes carbon remobilization from culms and sheaths to grains and NSC(non-structural carbohydrate) residue in the stems at heading stage increased, and the reversed result was observed at the maturity stage. Reasons for the differences in the formation of nutrient absorption were discussed in the paper.