Abstract
By a pot experiment, two kinds of crop stubble (wheat, soybean) were added into continuous cropping soil of cucumber according to different quantity (0.5%, 1% and 2%), the effects of different kinds of stubble and quantity on the continuous cropping soil and growth of cucumber were investigated. The results showed that two kinds of crop stubble significantly decreased soil bulk density, and increased total porosity of soil. Each of all treatments significantly decreased the accumulation of salinity in soil within the entire growth period of cucumber. 2% wheat stubble treatment had the biggest drop in soil EC in the later period of cucumber growth. Soybean stubble treatment had the lesser effect on soil EC. Wheat and soybean stubble promoted the growth of cucumber, increased the yield of cucumber, and improved the quality of cucumber. 2% of wheat stubble treatment had a biggest increase in cucumber yield, which increased the yield by 34.23% compared with the control.
Highlights
Along with the continuous development of protected vegetables, it is increasingly common that the same kind of vegetable was continuously grown in the same piece of land, so, the soil diseases in protected vegetables cultivation becomes more and more severe [1]
Wheat and soybean stubble promoted the growth of cucumber, increased the yield of cucumber, and improved the quality of cucumber. 2% of wheat stubble treatment had a biggest increase in cucumber yield, which increased the yield by 34.23% compared with the control
All treatments increased the porosity of soil, the porosity constantly increased as the increase of stubble quantity. 2% wheat stubble had a greatest effect on the porosity of soil, increasing by 24.4% than the control, and followed by 2% soybean stubble, increasing by 18.96%
Summary
Along with the continuous development of protected vegetables, it is increasingly common that the same kind of vegetable was continuously grown in the same piece of land, so, the soil diseases in protected vegetables cultivation becomes more and more severe [1]. A number of vegetables in protected cultivation such as cucumber, tomato, eggplants, pepper and so on have frequently suffered continuous cropping obstacles, the continuous cropping obstacle often caused these plants weak growth, inferior fruit quality and special soil diseases [2,3]. The cucumber is one of the main types to be cultivated in protected vegetables, and it is even extremely intolerant to continuous cropping. The continuous cropping obstacles of cucumber is more severe, which has already become one of the major factors for restricting the yield and quality of protected cucumber. It is imminent to solve the problem of continuous cropping obstacle of protected cucumber. In order to explore the effective ways and measures to overcome or reduce continuous cropping obstacle of pro-
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