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在田间试验条件下对覆膜旱作稻体内N、P、K养分浓度、吸收动态及N肥利用率作了研究。结果表明,相同施肥处理条件下不同生育期覆膜旱作稻N、P、K养分浓度及吸收量均高于水作稻,尤以生育中后期较为明显;覆膜旱作稻全生育期N、P、K养分吸收量明显高于水作稻,分布在籽粒中的N、P、K养分含量也有所提高,而在整株中的占有率差异不大,N肥利用率提高12%左右。
The nutrient concentration, absorption dynamics and N use efficiency of N, P, K in upland rice with plastic film mulching were studied in the field experiment. The results showed that under the same fertilization conditions, the nutrient concentrations and uptake of N, P and K in dryland rice at different growth stages were higher than those in waterlogged rice, especially in middle and late growth stage. , P, K nutrient absorption was significantly higher than water for rice, distributed in the grain N, P, K nutrient content also increased, while little difference in the whole plant occupancy, N fertilizer utilization increased by about 12% .