원문정보
초록
영어
This experiment was conducted to study the effect of different water and fertilizer inputs on the yield to improve the paddy yield in blackland in the cold region. A water-fertilizer coupling mathematical model between the yield and factors including N fertilizer, K fertilizer, P fertilizer and irrigation water(W)amount under controlled irrigation was established based on quadratic D-416 optimized saturation design and test-pit experiment. According to the results, the sequence on effects of water and fertilizer on the yield: W > N > K > P, and as the above inputs increasing, the yield increased at an earlier stage but declined later; for the effects caused by reciprocal action of two factors, the yield increased at an earlier stage but started to decline when certain threshold was reached, the sequence on effects caused by reciprocal action of two factors on the yield: N&K > N&W > K&W > N&P > P&W >K&P; under a yield target range of 10500~12000kg/km3 and a confidence interval of 95%, an optimized water and fertilizer adaptation program was 129.10~150.79 kg/hm2，K2O：81.15~105.47 kg/hm2，P2O5：43.19~71.71 kg/hm2, the soil water content at late tillering stage was 70.07%~72.57% of saturated water content.
목차
1. Introduction
2. Materials and Methods
2.1. General Information on the Experimental Field
2.2. Experiment Design and Management
2.3. Test Items
3. Results Analysis
3.1. Establishment of Regression Model
3.2. Main Effect Analysis on Factors
3.3. Signal-Factor Effect Analysis
3.4. Single-Factor Marginal Effect Analysis
3.5. Factor Interaction Effect Analysis
3.6. High-Yield Optimized Program Analysis
4. Conclusion
Acknowledgment
References