摘要
以新疆阿克苏地区10龄骏枣树为研究对象,采用田间施肥试验法,测定有机肥与化肥不同配比下土壤主要营养成分的变化趋势及其对骏枣的光合特性、叶绿素含量和叶果比的影响。结果表明:随着复混肥施入量的增加,土壤中碱解氮、速效磷和速效钾含量均逐渐增高,且土壤上层(0~30 cm)中的碱解氮、速效磷和速效钾含量均明显高于下层(30~60 cm);与果实膨大期相比,果实成熟期的土壤主要营养成分含量明显减少,其中碱解氮和速效磷含量的减少量明显大于速效钾含量的减少量。骏枣叶片的光合速率(Pn)和叶绿素含量均随着复混肥施入量的增加而上升,所有施肥处理的Pn均比对照(CK)高,其中T11处理的Pn达(24.53±2.40)μmol m-2 s-1,其水分利用效率和总叶绿素含量也均较高。骏枣叶果比随着复混肥施用量的增加呈现逐渐上升趋势,各处理中T3与T5和T6,T4与T7,T8与T9和T10处理之间均无显著差异。
With 10-year-old Junzao trees in Aksu region of Xinjiang as research objects, we adopted a field fertilization test to measure the main trend of soil nutrients under different proportions of organic and inorganic fertilizer, and study their effects on photosynthetic parameters, chlorophyll contents and leaf-fruit ratios. The results showed that the increasing organic and inorganic fertilizer's application rates gradually increased the contents of available N, available P and available K. And the available N and available P and available K contents in top-soil(0~ 30 cm) were significantly higher than the subsoil(30 ~ 60 cm). The major soil nutrient contents within fruit maturation period were significantly reduced compared with fruit enlargement period. And the reduced amounts of available N and available P were significantly greater than the available K. With the increasing organic and inorganic fertilizer application rates, the increments were observed in photosynthetic rates(Pn) and chlorophyll contents of Junzao leaf. The Pn of all fertilization treatments was higher than the control treatment(CK). Pn in T11 treatment was 24.53± 2.40 μmol m-2s-1, and its water use efficiency(WUE) and total chlorophyll content were also higher. Leaf-fruit ratios of Junzao showed a gradual upward trend with increasing soil nutrient content, and there were no significant difference between the T3 and T5, T6, T4 and T7, T8 and T9, T10.
出处
《土壤通报》
CAS
CSCD
北大核心
2015年第2期405-411,共7页
Chinese Journal of Soil Science
基金
新疆维吾尔自治区"十二五"重大科技专项(201130102-2)
新疆维吾尔自治区科技厅公益性科研院所基本费专项资助
关键词
骏枣
复混肥
光合特性
叶果比
土壤养分
Junzao
Compound fertilizer
Photosynthetic parameters
Leaf-fruit ratio
Soil nutrient
