[Characteristic research on soil nutrient of root of Pseudostellaria heterophylla root zone and non-root zone in different planting patterns].

OBJECTIVE

To research the influence of Pseudostellaria heterophylla planting patterns on soil nutrients.

METHODS

The root zone and non-root zone soil nutrient status were analyzed, which included the crop rotation, intercropping, relay cropping, 1-year planting, 3-year planting, 6-year planting and 10-year planting.

RESULTS

The results showed that there were differences in the soil nutrient of root zone among different planting patterns. The soil nutrient of root zone in seven different planting patterns were all significantly higher than that of non-root zone soil. And the soil nutrients of root zone showed a significant enrichment. The enrichment ratio of total K and Olsen K in 6-year and 10-year planting were both negative value, which indicated that the soil potassium was deficiency. The average pH value of root zone was 0.32 lower than that of non-root zone. There was a significant positive correlation between the organic matter value and the total nitrogen content in root zone and non-root zone (P < 0.01). The soil nutrients were high in crop rotation and intercropping, it would he helpful to improve soil quality and absorption to nutrient.

CONCLUSIONS

The reasonable application of nitrogen fertilizer ,organic fertilizer and potash fertilizer can significantly increase the organic matter content in soil ,and it will help to retain the fertilizer capacity of soil.