作物有效营养面积及最佳营养面积研究

通过无肥区和施肥区不同土壤营养面积的试验得出 :黑土垄作区甜菜的有效营养面积是 3 7.8～ 5 3 .4× 67cm ;最佳营养面积是 2 7.3～ 2 9.7× 67cm。无肥区植株有较小的有效营养面积和最佳营养面积 ,施肥区植株有较大的有效营养面积和最佳营养面积。土壤营养面积过小 ,个体生长影响较大 ,会改变其生物学生长规律 ,S型生长曲线不明显

Effective and Optimum Soil Nutrient Areas for Crops

High crop yield is obtained from coordination increase of individual and colonial growth. In order to achieve the high yield, it is necessary to know the individual productivity and colonial productivity. When the individual crop yield is up to maximum value, the soil nutrient area where the crop grower is called crop effective nutrient area, and when the colonial crop yield reaches maximum value, the soil nutrient area is called the crop optimal nutrient area. In this study the experiment on different soil nutrient areas has been done through the fertilizer-applying plots and fertilizer -free plot. The results showed that the effective nutrient area of sugar beet planted in the ridge field of black soil region was 37.8 to 53.4×67cm and its optimum area was 27.3 to 29.7×67 cm. In the plot of fertilizer-free, there is relatively smaller effective and optimal nutrient areas. and in the fertilizer-applying plot there is comparatively larger effective and optimum nutrient areas. If the soil nutrient area is too small, the individual crop's growth will be influenced greatly, the regular pattern of its biological development will be changed. The "S" curve of its growth is not remarkable.