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Copyright of Journal of Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] This study aimed at probing into the effects of the different mulching patterns on the dynamic changes and distribution characteristics of nitrate nitrogen in the root-layer soil profile of winter potato. [Method] In the field experiment, the first grade virus-free seed tuber of Favorita potato was used as the tested plant. Using a completely randomized block design, three covering treatments were arranged: no mulch (T1),6000 kg/hm² rice hull mulch (T2), and black film mulch (T3). [Result] The dynamic changes of nitrate nitrogen in the root-layer profile in terms of rice husk mulching and black film mulching treatments were basically consistent, but there were differences between the dynamic changes of rice husk mulching and black film mulching treatments; In the early stage of winter potato growth, the soil nitrate nitrogen content of no-mulch treatment was higher than that of rice husk and black film mulch treatment, while the soil nitrate nitrogen content of rice husk and black film mulch treatment was higher than that of no-mulch treatment; At harvest time, the soil nitrate nitrogen content in the 020 cm soil layer treated with rice husk was lower than that in the 20-40 cm soil layer, but the difference between the two soil layer did not reach a significant level (P>0.05). The soil nitrate nitrogen content in the other sampling periods and with other treatments showed that the value in 0-20 cm layer was higher than that of 20-40 cm. [Conclusion] Except that the content of nitrate nitrogen in soil 20-40 cm under rice husk mulching was no marked higher than that in soil 0-20 cm at harvest time, the content of nitrate nitrogen in 0-20 cm soil layer under different mulching modes was higher than that in soil 20-40 cm at different stages. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Potato Journal is the property of Northeast Agricultural University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)