| Cite this article: | 郑浣彤,耿艳秋,金峰,等.秸秆还田与氮肥运筹对水稻产量及氮素利用的影响[J].灌溉排水学报,0,():-. |
| ZHENG Huantong,GENG Yanqiu,JIN Feng,et al.秸秆还田与氮肥运筹对水稻产量及氮素利用的影响[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 1692Times Download 0Times |
|
|
|
| DOI： |
|
| Effects of straw returning and nitrogen fertilizer application on rice yield and nitrogen utilization |
|
ZHENG Huantong, GENG Yanqiu, JIN Feng, SUN Qi, LIU Lixin, GUO Liying, SHAO Xiwen
|
|
College of Agriculture,Jilin Agricultural University
|
| Abstract: |
| 【Objective】To find out the effect of the best ratio of nitrogen fertilizer application on rice yield and nitrogen utilization under the condition of straw returning to the field, and to provide a reasonable nitrogen fertilizer operation model for rice production under the condition of straw returning to the field.【methods】The experiment is based on the rice variety Jiggle 88 as the test material.The split zone test design is adopted in this experiment.The main area is straw return to the field.(S),uncovered straw returned to the field (S0). Under the same total N application of 200 kg.hm-2,four application patterns with the application ratio of base fertilizer,tillering fertilizer and panicle fertilizer at N1(7:2:1),N 2 (6:3:1),N 3 (5:3:2),N 4 (4:3:3).The effects of each treatment on rice yield and yield components, dry matter accumulation and nitrogen use efficiency were studied.【results】the results showed that straw returning to the field could effectively increase dry matter and nitrogen accumulation, improve nitrogen use efficiency and rice yield. Under the condition of straw returning to the field, when the proportion of nitrogen fertilizer was base fertilizer: tiller fertilizer: panicle fertilizer = 7:2:1 (N1), it could effectively promote the dry matter accumulation from heading to maturity, increase the nitrogen accumulation and nitrogen use efficiency at the main growth stage of rice, and significantly increase the rice yield, which was the best nitrogen fertilizer operation model in this experiment. However, the treatment of N4(basic fertilizer: tiller fertilizer: panicle fertilizer = 4:3:3), which was not applied enough in the early stage of nitrogen fertilizer, was not conducive to the dry matter and nitrogen accumulation in the main growth period of rice, which led to the decrease of nitrogen use efficiency and yield of rice.The correlation analysis showed that the total dry matter accumulation during the whole growth period was positively correlated with panicle number and grain number per panicle(r=0.824** - 0.920**), but not with 1000-grain weight and seed setting rate.【conclusion】under the condition of straw returning to the field as 8.0 t.hm-2, the operation of nitrogen fertilizer with base fertilizer: tiller fertilizer: panicle fertilizer at 7:2:1 can effectively increase the accumulation of dry matter and nitrogen in each period, improve the nitrogen use efficiency and rice yield, and is the best proportion of nitrogen fertilizer operation. |
| Key words: rice;straw returning; nitrogen fertilizer application; Nitrogen use efficiency;yield |
|
|
|
|
|
|
