摘要
在陕北黄土丘陵沟壑区对清耕和问作沙打旺(Astragalus adsurgens)6年、4年、2年仁用杏园0～500cm土层土壤水分、有机质、全氮、全磷、速效氮、速效磷、速效钾含量及树体生长状况进行了测定,结果表明,间作沙打旺,除了在秋季提高了0～100cm土层土壤水分以外,在春季、夏季和秋季均显著降低了0～500cm土层土壤水分,且间作沙打旺年限越长,降低越显著。间作沙打旺提高了0～100cm土层土壤有机质和全氮含量,间作年限越长效果越显著,但对100cm土层以下的土壤有机质和全氮无显著影响。间作沙打旺对土壤全磷含量无显著影响。间作沙打旺显著降低了土壤速效养分含量,其中速效氮降低深度达500cm土层,速效磷、速效钾达300cm土层,且间作年限越长,降低越显著。间作沙打旺显著削弱了树体的长势,降低了坐果率和杏仁产量。间作沙打旺存在着与仁用杏争水争肥的矛盾,黄土丘陵沟壑区仁用杏园不宜间作沙打旺。
The experimentation of interplant Astragalus adsurgens in Armeniaca vulgaris×A. sibirica orchard had been done in loess hilly and gully region of northern Shaanxi. The moisture, organic matter, total N, total P, available N, available P, available K of 0-500 cm soil layers and the growth status of A.vulgaris×A. sibirica of clean tillage, interplant six years, interplant four years and interplant two years had been determined. The results showed that the soil moisture of interplant As. adsurgens increased in 0-100 cm soil layer in autumn, but the soil moisture of the treatments of interplant As. adsurgens reduced significantly in springtime, summertime and autumn in 0-500 cm soil layer, and the soil moisture reduced obviously as interplant years increasing. In 0-100 cm soil layers, organic matter and total N of the treatments of interplant As. adsurgens were higher than clean tillage, and increased obviously as interplant years increasing, but the soil organic matter and total N under 100 cm soil layers weren＇t significant difference than clean tillage. Between the treatments of interplant As. adsurgens and clean tillage, soil total P didn＇t have significant difference. Soil available N, available P and available K of the treatments of interplant As. adsurgens were significant lower than clean tillage, soil available N reduced from 0 cm to 500 cm soil layers, soil available P and available K reduced from 0 cm to 300 cm soil layers, and the content of available N, available P and available K in soil decreased obviously as interplant years increasing. The A. vulgaris×A. sibirica growth of the treatments of interplant As. adsurgens were significant weaker, and fruit set percentage and the almond yield were significant lower than clean tillage. Between As. adsurgens and A. vulgaris×A. sibirica there were a contention for water and nutrient, A. vulgaris×A. sibirica orchard wasn＇t suitable interplant As. adsurgens in loess hilly and gully region.
出处
《园艺学报》
CAS
CSCD
北大核心
2007年第5期1135-1140,共6页
Acta Horticulturae Sinica
基金
国家‘十一五’科技支撑项目(2006BAD09B07)
中国科学院水利部水土保持研究所领域前沿项目(SW05103)
中国科学院知识创新工程项目(KZCX2-05)
关键词
仁用杏
沙打旺
间作
土壤水分
土壤养分
树体生长
Armeniaca vulgaris×A.sibirica
Astragalus adsurgens
Interplant
Soil moisture
Soil nutrient
Growth status
