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Effects of Using Waste Rice Water In The Growth of Pechay (Brassica Rapa)

Author: Mariah Nickole T. Garcia

The study investigated the effects of using waste rice water (WRW) in the growth of pechay (Brassica rapa). Specifically, this study answered to the following; 1) the chemical composition in rice water, 2) the effects of different treatments to the growth of Pechay (Brassica rapa subsp. chinensis) on the following parameters: (a) Weight, (b) Number of Leaves, (c) Height. 3) the significant difference in the growth of Pechay (Brassica rapa subsp. chinensis) according to different treatments. 4) the socio-economic desirability of the use of waste rice water (WRW) on the growth and production of pechay.

The method used in this study was Quasi-experimental method. A quasi- experimental design aims to establish a relationship between an independent and dependent variable. The effects of varying the amount of waste rice water (WRW) fed to each Pechay (Brassica rapa) were studied using experimental approaches. This study revealed that: 1) this wastewater, sometimes called washed rice water (WRW), contains a number of vital plant nutrients, including (in mg L-1) 40 to 150 of N, 4.19 to 10.14 of NO-3 -N, 2.57 to 39.72 of NH+4-N, 43 to 1630 of P, 51 to 200 of K, 8 to 2944 of Ca, 36 to 1425 of Mg, and 27 to 212 of S. 2) The first wash of rice has a larger weight than the second wash among all of the treatments, However, as compared to treatments in 100 ml and 150 ml for the first and second washes, treatments in 50 ml had the maximum weight. Compared to treatments 50 and 150 ml, treatment in 100 ml has the tallest plants in terms of height in both the first and second wash. In contrast to treatments of 50 and 100 ml, treatment in 150 ml has the largest average number of leaves in both the first and second wash. 3) Based on the study’s findings, a one-way ANOVA was performed on the data. The F value for the impact of 50 ml of WRW (1st wash) on the number of leaves was determined to be 0.131502 and the F critical value to be 2.156424. For 50 ml WRW (2nd wash), F is 0.045429, and F critical is 2.90112. F value for the treatment in 100 ml of WRW (1st wash) is 0.333276, and F critical is 2.156424. For 100 ml WRW (2nd wash), the F value and F critical are 0.139366 and 2.90112, respectively. For treatment in 150 ml WRW (1st wash), F value is 0.302323; F critical is 2.156424. The 150 ml WRW (2nd wash) has a F value of 0.717428 and a F critical value of 2.90112. And 4) This study uses organic fertilizer for Pechay plants made from leftover rice, which is readily available in homes. Reusing and recycling the water used to cook the rice is a clever way to conserve water. Pechay and other crops can be planted in backyards or urban gardens to lower food prices for city dwellers and ensure that the products they purchase are suitable for human consumption.

The study concluded that: 1) The Pechay (Brasicca rapa) had access to the nutrients from leached rice that they required for growth. in particular, the nitrogen, which is most important to plants and aids in photosynthesis. 2) This merely serves to show that the Pechay (Brassica rapa), which receives and needs the waste rice water from the first (1) wash, contains higher quantities of nutrients leached from rice than the second (2) wash. 3) The findings lead to the conclusion that the test was not statistically significant because none of the F values for the three treatments significantly deviated from the F critical level. As a result, the researcher arrived to the conclusion that the null hypothesis, “There is no significant difference in the growth performance of Pechay according to the different water treatment,” is not rejected based on the One-way ANOVA analysis of P-value. 4) The use of natural components in place of commercial feeds is growing, which reduces total operating costs and helps our agriculture. Reducing waste also benefits the environment and lowers food costs for families, especially low-income families. Aside from it is free to acquire, it both fixed and variable expenses must be factored into the price of converting garbage into fertilizer.


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