|Table of Contents|

Nitrogen Fertilizer Application Rate on Dry Matter Accumulation，Nitrogen Absorption and Utilization of Grafted Wax Gourd

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2023年04
Page:
33-38
Research Field:
Publishing date:

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Title:
Nitrogen Fertilizer Application Rate on Dry Matter Accumulation，Nitrogen Absorption and Utilization of Grafted Wax Gourd
Author(s):
LIAO Daolong1; 2; HUANG Xiangxinlan1; LIU Zifan1; FU Houlong1; FU Junyu1
(1.College of Tropical Crops，Hainan University，Haikou，Hainan 570228;2.Institute of Vegetables，Hainan Academy of Agricultural Sciences，Haikou，Hainan 571100)
Keywords:
nitrogen fertilizer application rate; grafted wax gourd; dry matter accumulation; nitrogen absorption; nitrogen utilization
PACS:
-
DOI:
10.11937/bfyy.20222632
Abstract:
Taking the grafted wax gourd as the test material，which was obtained using ‘Haizhen No.1’ as rootstock and ‘Tiezhu 168’ as scion，three treatments of 15，30 kg and 45 kg per 667m2 (represented by N15，N30 and N45) were set.Dry matter mass and nitrogen content of wax gourd organs were measured at four growth stages,early spreading，early flowering，early fruit expansion and middle and late fruit expansion.Then，yield，nitrogen physiological efficiency，nitrogen absorption and utilization efficiency，partial productivity of nitrogen fertilizer and harvest index were analyzed，in order to provide reference for nitrogen fertilization and cultivation management of the grafted wax gourd.The results showed that,1) The effect of nitrogen application rate on dry matter accumulation of stem，leaf and fruit was not significant in the four growth stages，the stem and leaf dry weight of the three nitrogen application rates increased significantly first and then remained relatively stable with the prolonging of growth period，the fruit dry weight of N15 and N30 treatment in middle and late fruit expansion was significantly higher than in early fruit expansion，there was no significant difference in fruit dry weight between N45 treatment at the early and middle stages of fruit enlargement.2) There was no significant difference in the nitrogen content of stem and leaf among the three nitrogen application rates in the early stage of spreading and the middle and late stage of fruit expansion，leaf nitrogen content of N15 treatment remained relatively stable from the early stage of spreading to the early stage of fruit expansion，and decreased significantly at the middle and late stage of fruit expansion，the leaf nitrogen content of N30 and N45 treatments at the early stage of extension were significantly lower than at the early stage of flowering，and then decreased significantly，but there was no significant difference between the early stage of fruit expansion and the middle and late stage of fruit expansion.3) There were no significant differences in nitrogen utilization efficiency and yield among the three nitrogen application rates，nitrogen physiological efficiency，nitrogen absorption efficiency，partial productivity and harvest index of N15 treatment were significantly higher than those of N45 and N30 treatment，The nitrogen absorption efficiency and partial nitrogen productivity of N30 treatment were significantly higher than that of N45 treatment.It was completely feasible to reduce nitrogen fertilizer application to 15 kg per 667 m2 under the premise of current nitrogen application rate of local melon farmers.There was recommended to adopt measures such as pruning，topping and pinching during the fruit expansion period to inhibit vegetative growth and promote the increase of wax gourd yield.

References:

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Last Update: 2023-03-21