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Agricultural University of Hebei (2009)

Research on Mutual Effect of Root and Water in Ridge Culturing Pumpkin in Cold Highland Semiarid Region

董肖杰; Dong Xiao Jie

Titre : Research on Mutual Effect of Root and Water in Ridge Culturing Pumpkin in Cold Highland Semiarid Region

Auteur : 董肖杰; Dong Xiao Jie

Grade : Master’s Theses 2009

Université : Agricultural University of Hebei

Résumé partiel
Sandy chestnut soil with drought, roughness and thin soil layer of field accounted for more than 65% of whole cultivated area in north-west of Hebei plateau. Uneven distribution of the rainfall in annual and internet-annual, which maked intra-regional agricultural production low and untable. Aparse planting pumpkin had the special resource utilization property. In the research, using sandy chestnut soil as the experimental soil and using pumpkin as the tested materials, potted experiment and root-bag control experiment were conducted, to study the response of different soil moisture and soil root-growing space to pumpkin and water efficient utilization of root under planting patterns with ridge culture and film mulching on furrow. The main results were as follows:1. Simulating different precipitation years through five water treatments : dry style(W158, CK), normal style (W258), wet style (W358), dry and make-up water style (W178, suppling water at flowering and vine elongation and fruit expanding process of pumpkins, 10mm/once), normal and make-up water style (W278, supplying water at flowering and vine elongation and fruit expanding process of pumpkins, 10mm/once) under the pot experiment condition.The results showed that : Comparing with control, the pumpkin’s yield, dry matter quantity and fruit quality increased at different degree. The yield of W178 and W278 treatments reached 18 226.1kg·hm-2and 19 604.5kg·hm-2 respectively, which increased by 102.13% and 117.41%. The water supply quantity of wet style (W358) was more, but its yield was lower than W258, W178 and W278 treatments. The flesh thickness and average fruit weight increased by 26.29% 42.25% and 54.17% 116.67% compared with control. In comparison with control, Vc and starch content increased by 31.25% and 10.48% significantly, protein content increased by 29.26%, pectin content increased by 21.85% with the treatment of W278. In the treatment of W178 and W278, the water use efficiency (WUE) reached 89.57kg·mm-1·hm-2 and 64.76kg·mm-1·hm-2 respectively, which increased by 91.55% and 38.49%.The WUE of W358 treatment was lower than control. Characteristic parameters for the whole roots of W258, W358 and W278 treatments showed increasing trend compared with control. In W278 treatment, the total root length, root length less than 1mm, the total surface area and the total volume were the largest, which were 2.96times, 2.96times, 3.70times and 3.31times than that of control, respectively. The root dry weight increased by 50.05% compared with control.

Mots clés : pumpkin root system water supply soil root-growing space yield water use efficiency

Présentation (CNKI)

Page publiée le 25 octobre 2014, mise à jour le 14 février 2018