摘要
研究了小麦生长期内土壤氮、钾与小麦根系活力变化及其相关性。结果表明,土壤速效氮、速效钾和非交换性钾含量随小麦生育进程呈现有规律的变化;小麦根系活力呈现先增加,孕穗期峰值出现后迅速下降,成熟时根系活力下降到最低值的变化规律,不同施肥处理小麦整个生育期内根系活力大小顺序为:MNPK、NPK>NK>N、NP>CK、M。土壤速效氮、速效钾、非交换性钾含量与小麦根系活力呈显著或极显著正相关,说明土壤N、K养分有效性的高低是影响小麦根系活力的重要因素。
The dynamics of soil N and K nutrents and wheat root activities , and their relationships during wheat growth were studied. The content of soil available N, available K and non - exchangeable K changed regularly with wheat growth. The wheat root activities increased and reached a maximum during the heading stage, and then quickly decreased, and reached a minimum during the ripening stage. The order of wheat root activities during wheat growth was ： MNPK, NPK 〉 NK 〉 N, NP 〉 CK, M. The relationships between the content of soil available N, available K, non - exchangeable K and the wheat root activities reached significant or very significant level during wheat growth, this illustrated that the availability of soil N and K was an important factor that affected the wheat root activities.
出处
《土壤通报》
CAS
CSCD
北大核心
2005年第5期700-703,共4页
Chinese Journal of Soil Science
基金
教育部科学技术研究重点项目(2003-58)资助
关键词
土壤氮
钾
根系活力
小麦
紫色土
Soil N and K
Root Activity
Wheat
Purple Soil
