[Dynamics of soil enzyme activity and nutrient content in intercropped cotton rhizosphere and non-rhizosphere].
The study with high yield cotton-wheat double cropping system showed that soil urease, invertase, protease and catalase activities in intercropped cotton field had the same changing trends with those in mono-cultured cotton field, but were significantly higher in intercropped than in mono-cultured cotton rhizosphere and non-rhizosphere at all development stages of cotton. During the intergrowth period of wheat and cotton, soil nutrient contents in intercropped cotton rhizosphere and non-rhizosphere were lower than or had little difference with those in mono-cultured cotton rhizosphere and non-rhizosphere, but became significantly higher after wheat harvested. The changing trends of soil nutrient contents in intercropped cotton field had little difference from those in mono-cultured cotton field, but the nutrient absorption peak appeared late. The soil enzyme activities and nutrient contents were generally higher in rhizosphere than in non-rhizosphere of both intercropped and mono-cultured cotton. Soil nutrient contents had significant (P < 0.05, n = 32) or very significant (P < 0.01, n = 32) correlation with the activities of soil urease, invertase and protease, but had little correlation with soil catalase activity.
Meng
Yali
Y
Key Laboratory of Crop Growth Regulation of Agriculture Ministry, Nanjing Agricultural University, China.
Wang
Liguo
L
Zhou
Zhiguo
Z
Wang
Ying
Y
Zhang
Lizhen
L
Bian
Haiyun
H
Zhang
Siping
S
Chen
Binglin
B
D000383:Agriculture / Q000379:methods*; D003368:Gossypium / Q000254:growth & development*; D009584:Nitrogen / Q000032:analysis; D018517:Plant Roots / Q000201:enzymology*; D012987:Soil / Q000032:analysis*; D014908:Triticum / Q000254:growth & development*; D014510:Urease / Q000378:metabolism; D043324:beta-Fructofuranosidase / Q000378:metabolism
D012987:Soil; D043324:beta-Fructofuranosidase; D014510:Urease; D009584:Nitrogen