Effect of fertilization treatment and insect-proof net on the cucum-ber cowpea rotation planting soil nutrients and quality characters of cowpea
In order to ensure the quality and safety of cowpea,increase the yield of cowpea cultivation,and improve the soil in the production area.In this experiment,compound fertilizer and acidic soil improved fertilizer were applied to the rotation soil of cucumber and cowpea,which was covered by white insect-proof net.The effects of the two different treat-ments on soil conditions and the quality and agronomic traits of cowpea inside and outside the net were compared and ana-lyzed.The experiment was consisted of four areas:the test area and contrast area in the net,the test area and contrast area outside the net.The area of each residential area was uniformly 60 m2,with single factor random block design.The results showed that the pH of the test soil decreased by 0.44 and contrast soil decreased by 0.61,respectively.The soil or-ganic matter,available nitrogen,and available potassium content in the test area increased by 2.56 g·kg-1,42.37 mg·kg-1,48.87 mg·kg-1,respectively,compared to before the experiment,with relative increases of 12.37％,34.20％,20.34％.The available phosphorus content decreased by 3.98 mg·kg-1,compared to before the experiment,with a relative decrease of 1.95％.The pod rate,pod length,pod diameter and pod mass of cowpea in and out of net treated with acid soil improved fertilizer were higher than those of cowpea treated with compound fertilizer.The results of two kinds of topdressing treat-ment showed that the pod rate was significant,but the content of total sugar,protein and vitamin C content of cowpea in the test area were not significantly different from those in the contrast area.The fat content of cowpea in all treatments was the same.In general,the comprehensive traits of cowpea was better with acid soil improvement and topdressing treat-ment.
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