Journal of Food, Agriculture and Environment

Effects of different fillers and soil water contents in tightly covered greenhouse on soil chemical properties in continuous cropping

Author(s):

Xin-yu Mao ^{1, 2}, Xiao-hou Shao ^{1, 2}*, Jiu-gen Mao ³, Dong-sheng Wang ³, Ting-ting Chang ^{1, 2}

Recieved Date: 2013-06-16, Accepted Date: 2013-10-08

Abstract:

Covering greenhouse tightly has become one of the most effective methods for controlling continuous cropping obstacles by increasing the temperature. In order to determine the optimal scheme for covering greenhouse tightly, effects of different fillers and soil water contents in tightly covered greenhouse on soil chemical properties were conducted in this paper. The preliminary results indicated that soil chemical properties were closely related to different fillers, soil water contents and duration in covering greenhouse tightly. Applied both calcium cyanamide (CaCN₂) and organic fertilizer (OF) with soil water content of 85- 100% could effectively regulate soil acidity, alleviate the rise of soil salinity, increased soil organic matter (OM) and balance soil available nutrients. Nitrogen was easy to lose and soil available phosphorus (AP) was low when soil water content was smaller than 85% of field capacity. The soil available potassium (AK) was decreased when it was larger than 100% of field capacity. In terms of duration, 15 - 20 d was optimal where soil EC, pH value, AP, AK and NH₄⁺ -N reached peaks. After 20 d, except for quantity of NH₄⁺ -N transformed into NO₃-N which led to the loss of nitrogen, no significant variations were observed among the other soil chemical indexes. In conclusion, covering greenhouse tightly with application of both CaCN₂ and OF as well as 85-100% soil water content of field capacity in 15 - 20 days was the optimal scheme for controlling the continuous cropping obstacles by improving soil chemical properties.

Keywords:

Covering greenhouse tightly, filler, soil water content, duration, soil chemical prosperities, continuous cropping

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2389-2392

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